EMNA Q.4

4If a and b are prime numbers, which of the following is true?

I. a² has three positive integer factors.

II. ab has four positive integer factors.

III. a³ has four positive integer factors.

Option : C
Explanation :
Factors of a² are 1. a and a².
Factors of ab are 1, a, b and ab.
Factors of a³ are 1. a. a² and a³.

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