Question

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

Answer 1

Answer:

(i) 20 and 28

factors of 20: 1,2,4,5,10,20

factors of 28: 1,2,4,7,14, 28

common factors=1,2,4.

ii) 15 and 25

Factors of 15: 1,3,5,15

factors of 25: 1,5,25

common factors=1,5

iii) 35 and 50

factors of 35: 1,5,7,35

factors of 50: 1,2,5,10,25, 50

common factors=1,5

iv) 56 and 120

factors of 56: 1,2,4,5,10,20

factors of 120: 1,2,4,7,14, 28

common factors=1,2,4.

Answer 2

Answer:

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. ...

b) 15 and 25. Factors of 15 = 1, 3, 5 and 15. Factors of 25 = 1, 5 and 25. ..

.

c) 35 and 50. Factors of 35 = 1, 5, 7 and 35. Factors of 50 = 1, 2, 5, 10, 25 and 50. ...

d) 56 and 120. Factors of 56 = 1, 2, 4, 7, 8, 14, 28 and 56