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Question -

In which of the following expressions, prime factorization has been done?

(a) 24 = 2 ├Ч 3 ├Ч 4 (b) 56 = 7 ├Ч 2 ├Ч 2 ├Ч 2

(c) 70 = 2 ├Ч 5 ├Ч 7 (d) 54 = 2 ├Ч 3 ├Ч 9



Answer -

(a) 24 = 2 ├Ч 3 ├Ч 4

Since 4 is composite, prime factorisation has not been done.

(b) 56 = 7 ├Ч 2 ├Ч 2 ├Ч 2

Since all the factors are prime, prime factorisation has been done.

(c) 70 = 2 ├Ч 5 ├Ч 7

Since all the factors are prime, prime factorisation has been done.

(d) 54 = 2 ├Ч 3 ├Ч 9

Since 9 is composite, prime factorisation has not been done.

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