Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.3

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Tamilnadu Samacheer Kalvi 5th Maths Solutions Term 1 Chapter 1 Geometry Ex 1.3

Question 1.
The angles below 90° and above 0° are called as _________
Answer:
acute angle

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.3

Question 2.
The angles below 180° and above 90° are called as __________
Answer:
obtuse angle.

Question 3.
By joining two right angles ________ angle is formed
Answer:
straight angle

Question 4.
The obtuse angle in ΔABC is ________
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.2 1
a. ∠A
b. ∠B
c. ∠C
Answer:
c) ∠C

Question 5.
Hand of a clock at 3.20 shows ________ angle.
Answer:
acute

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.3

Question 6.
In the following letters, which one forms the right angle in it?
a. L
b. K
c. Z
d. N
Answer:
a. L

Question 7.
Circle the right angle.
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.2 2
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.2 3
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.2 4
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.2 5
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.2 3

Question 8.
The angle shown in this picture is
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.2 6
a. more than 120°
b. Less than 45°
c. more than 180°
d. 90°
Answer:
d. 90°

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 1 Geometry Ex 1.3

Question 9.
The angle formed by the nail cutter is _______
Answer:
acute

Question 10.
Name the angles formed when the vessels are lifted by tongs in the kitchen.
Answer:
obtuse angle

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Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions

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Tamilnadu Samacheer Kalvi 5th Maths Solutions Term 1 Chapter 2 Numbers InText Questions

Rounding to the Nearest Thousandth Calculator is an online tool that rounds off a decimal number to its nearest thousandths place.

Activity (Text Book page No.26)

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 1
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 2

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions

Activity (Text Book page No.27)

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 3
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 4

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions

Crore in many ways
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 5
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 6

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions

Fill in the correct numbers in the following tables.

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 7
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 8

Activity: 1 (Text Book page No.28)

The Abacus shows the number 34,284
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 9
Number name: ________
Expanded form: 3 Ten thousands + 4 thousands +2 hundreds + 8 tens + 4 ones.
= 30,000 + _____ + 200 + _____ + _____
3 × 10,000 + 4 × ____ + 2 × 100 + 8 x ____ + ____ × 1
Answer:
Number name: Thirty four thousand two hundred and eighty four.
Expanded form: 3 Ten thousands + 4 thousands +2 hundreds + 8 tens + 4 ones.
= 30,000 + 4000 + 200 + 80 + 4
= 3 × 10,000 + 4 × 000 + 2 × 100 + 8 x 10 + 4 × 1

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions

Try These (Text Book page No.29)

How many thousands are there in 3,45,789?
Answer:
345 thousands

Activity: 2 (Text Book page No.29)

Look at the Abacus and fill in the blanks.

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 11
Number: ________
Number name: _______
Expanded form: 5 ten lakhs + ______ lakhs + ______ ten thousands + 1 _______ + 2 ________ + 5 tens + ______ ones
= 5000000 + ____ + 40000 + ______ + 200 + 50 + 8
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 10
Number: 52,41,258
Number Name: Fifty two lakhs forty one thousands two hundred and fifty eight.
Expanded form:
= 5 ten lakhs + 2 lakhs + 4 ten thousands + 1 x thousand + 2 hundreds + 5 tens + 8 ones
= 5000000 + 200000 + 40000 + IQOO + 200 + 50 + 8.

Activity: 3 (Text Book page No.30)

Look at the Abacus and fill in the blanks.

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 11
Given number: _________
Number Name: _______________
Expanded form: 6 crores + _____ Ten Iakhs + _____ Lakhs + 3 _______+ 5 Thousands + ______ + 1 Ten + 5 ones.
= 6,00,00,000 + 40,00,000 + ________ + ________ + 5000 + 400 + _______ + 5
= 6 × _____ + 4 × _____ + 2 × 100,000 + 3 × 10000 + 5 × _______ + _______ × 100 + 1 × 10 + _______ × 1
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 12
Given Number: 6,42,35,415
Number Name: Six crores forty two lakhs thirty five thousands four hundred and fifteen
Expanded form: 6 Crores + 4 ten lakhs + 2 lakhs + 3 ten thousands + 5 Thousands + 4 hundreds + 1 ten + 5 ones.
= 6,00,00,000 + 40,00,000 + 2,00,000 + 30,000 + 5,000 + 400 + 10+5.
= 6 × 1,00,00,000 + 4 × 10,00,000 + 2 × 1,00,000 + 3 × 10,000 + 5 × 10,000 + 4 × 100 + 1 × 10 + 5 × 1.

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions

Activity (Text Book page No.30)

Write the place value of 7 and 1 for the given numbers.
a. 81,70,453
b. 3,46,710
c. 1,87,13,971
Answer:
a. 81,70,453
The place value of 7 is 7 × 10,000 = 70,000
The place value of 1 is 1 × 1,00,000 = 1,00,000

b. 3,46,710
The place value of 1 is 1 × 10 = 10
The place value of 7 is 7 × 100 = 700

c. 1,87,13,971
The place value of 1 is 1 × 1 = 1
The place value of 7 is 7 × 10 = 70
The place value of 1 is 1 × 10,000 = 10,000
The place value of 7 is 7 × 1,00,000 = 7,00,000
The place value of 1 is 1 × 1,00,00,000 = 1,00,00,000

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions

Try These (Text Book page No.34)

1. 3,002 ____ 8,002
2. 43,731 ____ 44,371
3. 43,115 ____ 43,511
4. 13,435 ____ 13,4753
Answer:
1. 3,002 ____ 8,002
= 3,002 < 8,002

2. 43,731 ____ 44,371
= 43,731 < 44,371

3. 43,115 ____ 43,511
= 43,115 < 43,511

4. 13,435 ____ 13,4753
= 13,435 < 13,4753

Activity (Text Book page No.34)

1. Form the smallest and greatest five digit numbers using the given digits once.
(a) 7, 1, 0, 5, 4
(b) 3, 4, 7, 0, 9
(c) 9, 7, 1, 6, 4
(d) 4, 5, 9, 6, 7
Answer:
(a) 7, 1, 0, 5, 4
Smallest number = 10,457
Greatest number = 75,410

(b) 3, 4, 7, 0, 9
Smallest number = 30,479
Greatest number = 97,430

(c) 9, 7, 1, 6, 4
Smallest number = 14,679
Greatest number = 97,641

(d) 4, 5, 9, 6, 7
Smallest number = 45,679
Greatest number = 97,654

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions

2. Write the smallest numbers in the fruit and the greatest number in the flower.

(a) 45678, 145, 7829
(b) 23, 8873, 88738, 883
Answer:
(a) 45678, 145, 7829
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 13

(b) 23, 8873, 88738, 883
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions 14

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 2 Numbers InText Questions

Try These (Text Book page No.36)

1. Arrange the following numbers in the ascending order and descending order.
(i) 33,270; 1,078; 137; 27,935
(ii) 44,918; 32,113; 23,112; 42,231
(iii) 75,343; 30,475; 43,452; 13,055
(iv) 733; 34,946; 35,945; 23,745
Answer:
(i) 33,270; 1,078; 137; 27,935
Ascending order : 137,1,078, 27,935, 33,270
Descending order 5 33,270, 27,935, 1,078, 137

(ii) 44,918; 32,113; 23,112; 42,231
Ascending order : 23,112, 32,113, 42,231, 44,918
Descending order : 44,918, 42,231, 32,113, 23,112

(iii) 75,343; 30,475; 43,452; 13,055
Ascending order : 13,055, 30,475, 42,452, 75,343
Descending order ; 75,343, 42,452, 30,475,13,055

(iv) 733; 34,946; 35,945; 23,745
Ascending order : 733, 23,745, 34,946, 35,945
Descending order ; 35,945, 34,946, 23,745, 733

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Additional Questions

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Tamilnadu Samacheer Kalvi 5th Maths Solutions Term 2 Chapter 2 Numbers Additional Questions

What is the factor of 50 between 11 and 20? The factors of 50 are: 1, 2, 5, 10, 25, 50 None of them is between 11 and 20.

Question 1.
Find the common factors for:
(i) 6 and 9
(ii) 15 and 20
Answer:
(i) 6 and 9
Factors of 6 is 1, 2, 3, 6
Factors of 9 is 1, 3, 9
Common factors of 6 and 9 is 1, 3

(ii) 15 and 20
Factors of 15 is 1, 3, 5, 15
Factors of 20 is 1, 2, 4, 5, 10, 20
Common factors of 15 and 20 are 1, 5.

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Additional Questions

Question 2.
Draw a picture of factor tree.
(i) 45
(ii) 100
Answer:
(i) 45

(ii) 100

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Additional Questions

Question 3.
Write down the first 5 multiple of the given numbers.
(i) 15
(ii) 25
Answer:
(i) 15
15 × 1 = 15
15 × 2 = 30
15 × 3 = 45
15 × 4 = 60
5 × 5 = 75
5, 30, 45, 60, 75

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Additional Questions

(ii) 25
25 × 1 = 25
25 × 2 = 50
25 × 3 = 75
25 × 4 = 100
25 × 5 = 125
25, 50, 75, 100, 125

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

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The ultimate Mile Calculator.

Question 1.
Fill in the blanks.

a. 7m 5cm = ______ cm
Answer:
7m 5cm = 7 × 100 + 5cm: 700 + 5 = 705 cm

b. 505 mm = ______ cm ______ mm
Answer:
505 mm = 505 + 100 = 50 cm 5 mm

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

c. 326m = ______ cm
Answer:
326 m = 326 × 100 = 32600 cm

d. 5km 30m = _____ m
Answer:
5 km 30 m : 5 × 1000 + 30 = 5000 + 30 = 5030 m

e. 650cm: ______ m ______ cm
Answer:
650 cm = 650 ÷ 100 = 6 m 50 cm

Question 2.
True or false.

a) 600 m is 6mm.
Answer:
False (∵6 cm)

b) 7000 m is 7 km.
Answer:
True

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

c) 400 cm is 4 km.
Answer:
False (∵4m)

d) 770 mm is 77 cm.
Answer:
True

e) 9000m is 90 mm.
Answer:
False (∵ 9000 × 1000 = 9000000 mm)

Question 3.
Find the sum of the following

a. 17 m 45 cm + 52 m 30 cm
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 1
= 69 m 750 cm

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

b. 75 km 400 m + 37 km 300 m + 52 km 750 m
Answer:
400 + 300 + 750 = 1450 m
1450 m = 1 km 450 m
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 2
= 165 km 450 m

c. 4 cm 8 mm + 5 cm 9 mm
Answer:
8mm + 9mm = 17 mm = 1 cm 7 mm
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 3
= 1 cm 7mm

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

Question 4.
Subtract the following

a. 15 km 450 m – 13 km 200 m.
Answer:
Difference = 15 km 450 m – 13 km 200 m
= 2 km 250 m

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 4

b. 750 m 840 mm – 370m 480 mm.
Answer:
Difference = 750 m 840 mm – 370m 480 mm
= 380 m 360 mm

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 5

c. 5 km 400 m – 3 km 350 m
Answer:
Difference = 5 km 400 m – 3 km 350 m
= 2 km 50 mm

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 6

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

Question 5.
Multiply the following.

a. 350 m 45c m × 7
Answer:
45 × 7 = 315 m
= 3 m 15 m

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 7

350 m 45 cm × 7 = 2453 km 45 cm

b. 25 km 300 m × 6
Answer:
300 × 6 = 1800 m
= 1 km 800 m

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 8

25 km 300 m × 6 = 151 km 800 mm

c. 37 m 350 mm × 8
Answer:
350 × 8 = 2800 mm
= 2 m 800 mm

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 9

37 m 350 mm × 8 = 298 m 800 mm

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

Question 6.
Divide the following

a. 950 km 800 m ÷ 5
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 10
950 km 800 ÷ 5 = 190 km 160 m

b. 49 m 770 mm ÷ 7
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 11
49 m 770 mm ÷ 7 = 7 m 110 mm

c. 172 m 48 cm ÷ 4
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 12
172 m 48 cm ÷ 4 = 43 m 12 cm

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

Life Related Problems

Question 7.
Answer the foliowing:

a. Saravanan had chosen to drive his vehicle from puducherry to Chennai for a distance of 165 Km. While starting his vehicle, the odometre showed 000157 Km, Find the reading of the odometre, when he reach Chennai?
Answer:
Distance form Pudicherry to Chennai = 165 km
Odometer showed = 000157 km
Reading of odometer after reached Chennai = 165 km + 000157 km
= 000322 km.

b. Karthik Raja decided to travel from A. He moves lKm in east to reach B. Then he goes 2 Km towards north and reaches C. Then he goes 1 Km towards west and reaches D. If he goes 2 Km towards South, Where would he reach? Draw apt Diagram and Justify. Also find out the total distance travelled by him.
Answer:
Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 13
He would reach = A
Total Distance =1 + 2 + 1 +2 = 6 km

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

c. Sangeetha has just finished building a new house with garden area. She measured the garden area and found it to be 6m x 6m. Suppose she has to put a pole every lm, how many poles are required? Each pole is of height 1.5m from the ground, What should be the total length of the fencing material to fence the garden?
Answer:
Side of the Garden = 6m
No. of poles required = 6 + 6 +6+ 6= 24
The total length of the fencing material to fence the garden
= 24 × 1.5
= 36 m

d. One student needs lm 25 cm cloth to stich a shirt. What is the total length of clothes need to stitch a class of 22 students?
Answer:
Cloth is needed for one student = 1 m 25 cm
Total cloth is needed for 22 students
= 1 m 25 cm × 22
= 27 m 50 cm

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 14

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4

e. The distance from village A to village B is 3 km 450 m. The distance from village B to village C is 5 km 350 m. What will be the total length of the road, if the road is laid from village A to village C?
Answer:
Distance from village A to Village B = 3 km 450 m
Distance from village B to village C = 5 km 350 m
The distance from A to C = 8 km 800 m

Samacheer Kalvi 5th Maths Guide Term 1 Chapter 4 Measurements Ex 4 15

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.2

Students can download 5th Maths Term 2 Chapter 2 Numbers Ex 2.2 Questions and Answers, Notes, Samacheer Kalvi 5th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 5th Maths Solutions Term 2 Chapter 2 Numbers Ex 2.2

Question 1.
Choose the best answer:

(i) The number divisible by 5 with no remainder
(a) 14
(b) 535
(c) 447
(d) 316
Answer:
(b) 535

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.1

(ii) Pick the number which is not a multiple of 6.
(a) 18
(b) 26
(c) 72
(d) 36
Hint:
(a) 18 = 6 × 3
(c) 72 = 8 × 9
(d) 36 = 6 × 6
Answer:
(b) 26

(iii) The common multiple of 4 and 8 among the given number is.
(a) 32
(b) 84
(c) 68
(d) 76
Hint:
Multiples of 4 = 4, 8, 12, 16, 20, 24, 28, 32, 36, 40 ….
Multiples of 8 = 8, 16, 24, 32, 40, 48, 56, 64, …
Common multiples of 4, 8 is 8, 16, 24, 32, 40,…
Answer:
(a) 32

(iv) Factors of 6
(a) 1, 2, 3
(b) 1, 6
(c) 1,2,3,6
(d) 2,3
Hint: Multiple of 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, ……..
Answer:
(c) 1, 2, 3, 6

(v) Multiple of 9 is
(a) 79
(b) 87
(c) 29
(d) 72
Hint: Multiple of 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, …….
Answer:
(d) 72

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.1

Question 2.
Fill in the blanks:

Question 1.
Factors of 7 ______
Answer:
1, 7

Question 2.
The only even prime number is ______
Answer:
1,2

Question 3.
L.C.M of 4, 12 ______
Answer:
12

Question 4.
L.C.M of 5, 15 ______
Answer:
15

Question 5.
The numbers which divides 35 without reminders are _____, ______, ______.
Answer:
1, 5, 7

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.1

Question 3.
Write down the factors of the given numbers.
(i) 25
(ii) 36
(iii) 14
(iv) 16
(v) 12
Answer:
(i) 25
Factors of 25 is 1, 5, 25

(ii) 36
Factors of 36 is 1, 2, 3, 4. 6, 9, 12, 18, 36

(iii) 14
Factors of 14 is 1, 2, 7, 14

(iv) 16
Factors of 16 is 1, 2, 4, 8, 16

(v) 12
Factors of 1, 2, 3. 4, 6, 12

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.1

Question 4.
Draw a picture of factor tree.

(i) 18
(ii) 33
(iii) 16
(iv) 50
Answer:
(i) 18
Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.2 1

(ii) 33
Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.2 2

(iii) 16
Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.2 3

(iv) 50
Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.2 4

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.1

Question 5.
Write down the first 5 multiples of the given numbers.
(i) 7
(ii) 9
(iii) 16
(iv) 11
(v) 21
Answer:
(i) 7
= 7 Multiple of 7 – 7, 14, 21, 28, 35

(ii) 9
= 9 Multiple of 9 – 9, 18, 27, 36, 45

(iii) 16
= 16 Multiple of 16 – 16, 32, 48, 64, 80

(iv) 11
= 11 Multiple of 11 is 11, 22, 33, 44, 55

(V) 21
= 21 Multiple of 21 is 21, 42, 63, 84, 105

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.1

Question 6.
Find first three common multiples of the given numbers.
(i) 24, 16
(ii) 12,9
(iii) 24,36
Answer:
(i) 24, 16
Multiples of 24 = 24, 48, 72, 96, 120, 144, 168, 192, 216, 240, 264
Multiples of 16 = 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192. 208, 224, 240, 256
Common multiples of 24 and 16 is 48, 96, 144, 192, 240

(ii) 12, 9
Multiples of 12 = 12, 24, 36, 48, 60, 72, 84, 96, 108, 120,
Multiples of 9 – 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, 117
Common multiples of 12 and 9 is 36, 72, 108

(iii) 24, 36
Multiples of 24 = 24, 48, 72, 96, 120, 144, 168, 192, 216,
Multiples of 36 = 36, 72, 108, 144, 180, 216
Common multiples of 24 and 36 is 72, 144, 216

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.1

Question 7.
Find L. C.M of the given numbers.
(i) 12 and 28
(ii) 16 and 24
(iii) 8 and 14
Answer:
(i) 12 and 28
Multiples of 12 = 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 168, 180
Multiples of 28 = 28, 56, 84, 112, 140, 168, 196, ……
Common multiples of 12 and 28 is 84, 168, ……..
LCM is 84

(ii) 16 and 24
Multiples of 16 = 16, 32, 48, 64, 80, 96, 112, 128, 114, …….
Multiples of 24 = 24, 48, 72, 96, 120, 144, ……
Common multiples of 16 and 24 is 48, 96, 144, ……..
LCM is 48

(iii) 8 and 14
Multiples of 8 = 8, 16, 24, 32, 4O48, 56, 64, 72, 80, 88, 96, 104, 112, …
Multiples of 14 = 14, 28, 42, 56, 70,84 98 112 ……
Common multiples of 8 and 14 is 56, 112, …….

(iv) 30 and 20
Multiples of 30 = 30, 60, 90, 120, 150, 180, 210, 240, 270, …
Multiples of 20 = 20, 40, 60, 80, 100, 120, 140, 160, 180, …
Common multiples of 30 and 20 is 60, 120, 180
LCM of 30 and 20 is 60.

Samacheer Kalvi 5th Maths Guide Term 2 Chapter 2 Numbers Ex 2.1

The least common multiple (LCM) of 12 and 18 is 36.

Question 8.
Ramya visits the gym five days once and Kavitha visits the gym six days once. In which day will they meet each other?
Answer:
Multiples of 5 = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, …
Multiples of 6 – 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, …
Common multiples of 5 and 6 is 30, 60
LCM of 5 and 6 is 30.

Question 9.
Arun and shahjahan goes for walking in a circular path of a park in the same direction. Arun takes 6 minutes to complete one round, while shahjahan takes 8 minutes to completed one round. In how many minutes will they meet each other?
Answer:
Multiples of 6 = 6, 12, 18, 24, 30, 36, 42, 48, 54,…
Multiples of 8 = 8, 16, 24, 32, 40, 48, 56, 64, …
Common multiples of 6 and 8 is 24, 48, …
LCM of 6 and 8 is 24.
They will meet each other after 24 minutes.