Question

Which of the following number(s) is/ are perfect square of prime number(s)?

• A. $121$
• B. $169$
• C. $196$
• D. $256$

Answer 1

Answer: (A), (B)

$169$

Any number that can be expressed as the product of another number by itself is a perfect square.

Few common perfect squares are:
$121=11\times 11$
$169=13\times 13$
$196=14\times 14$
$256=16\times 16$

Out of these, $11$ and $13$ are prime numbers.
$\therefore$ Required answers are $121$ and $169.$