If n is a multiple of 5 and n=p^2 * Q, where p and Q are prime numbers, which of the following must be a multiple of 25?
1) P^2
2)Q^2
3)P^2 * Q
4)P^2 * Q^2
5) P^3 * Q
I couldn't understand how to solve this.
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givemeanid
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Since p and q are prime and n is a multiple of 5, either p is 5 or q is 5.
That means only p^2 * q*2 will be a multiple of 25.
Answer is D.
That means only p^2 * q*2 will be a multiple of 25.
Answer is D.
