Question

A 2-digit prime number N below 30
remains unchanged when its ones place
digit and tens place digit are
interchanged. What is the square of the
prime number N?
(A) 169
(B) 361
(C) 529
(D) 121
(E) None of these​

Answer 1

Answer:

option D) 121

Step-by-step explanation:

11 is a prime number as it has only two factors. One and itself.

if the numbers are interchanged, 11 remains 11

square of 11 is 11*11=121

Answer 2

121 is the answer

11x11=121

If you change the ones place and tens place the number is the same