Question

Question 1 Find the common factors of: (a) 20 and 28 (b) 15 and 25 (c) 35 and 50 (d) 56 and 120

Class 6 - Math - Playing with Numbers Page 59

Answer 1

a 1 ,2,4
b 1,5
c 5 ,1
d 1,2,4

Answer 2

Solution :-

a) 20 and 28

Factors of 20 = 1, 2, 4, 5, 10 and 20

Factors of 28 = 1, 2, 4, 7, 14 and 28

Common Factors of 20 and 28 = 1, 2 and 4

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b) 15 and 25

Factors of 15 = 1, 3, 5 and 15

Factors of 25 = 1, 5 and 25

Common Factors of 15 and 25 = 1, 5

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c) 35 and 50

Factors of 35 = 1, 5, 7 and 35

Factors of 50 = 1, 2, 5, 10, 25 and 50

Common Factors of 35 and 50 = 1, 5

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d) 56 and 120

Factors of 56 = 1, 2, 4, 7, 8, 14, 28 and 56

Factors of 120 = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60 and 120

Common Factors of 56 and 120 = 1, 2, 4, 8