Question

List the common factors of each of the following set of numbers and hence find their
HCF
(a) 10, 15
(b) 70, 120 (c) 42.54 (d) 100, 120, 20
(e) 256, 132, 64 (1) 500, 625, 225 (g) 200, 400, 650​

Answer 1

Answer:

a- 5

b-10

c- 6

d- 20

e- 4

f- 25

g- 50

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Answer 2

(a) 10, 15

Common factors - 1, 5

HCF - 5

(b) 70, 120

Common factors - 1, 2, 5, 10

HCF - 10

(c) 42, 54

Common factors - 1, 2, 3, 6

HCF - 6

(d) 100, 120, 20

Common factors - 1, 2, 4, 5, 10, 20

HCF - 20

(e) 256, 132, 64

Common factors - 1, 2, 4,

HCF - 4

(f) 500, 625, 225

Common factors - 1, 5, 25

HCF - 25

(g) 200, 400, 650

Common factors - 1, 2, 5, 10, 25, 50

HCF - 50