Exercise 2d Natural Numbers

Find the common factors of 12 and 16.

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Find the common factors of 30 and 45.

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Find the common factors of 25 and 36.

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Find the HCF of 12 and 13.

Find the HCF of 15 and 75.

Find the HCF of 324 and 128.

Find the HCF of 112, 64 and 96.

Find the HCF of 30 , 75 , 90 and 135.

Given that p+3 is the highest common factor of 81 and 108, find the value of p-3.

• 15

• 7

• 14

• 21

7 is a factor of p and p is a factor of 112. Find the possible values of p.

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