Question

1) The common factor of 4 and 15 is.

a) 1 b)2 c)3 d)5

2) Which of the following pairs of numbers are not co-prime?

a) 7,15 b)12,49 c)18,23 d)12,21

3) The greatest common factor of 5,15 and 25 is

a) 1 b)5 c)10 d)15

4) The HCF of 30 and 42 is

a) 2 b)3 c)5 d)6

5) The LCM of 5 and 6 is

a) 10 b)20 c)30​

Answer 1

Step-by-step explanation:

1)d

2)..

................

Answer 2

Answer:

1) 1.

2) 12,21.

3) 5.

4) 6.

5)30.

Step-by-step explanation:

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