[amp_mcq option1=”12″ option2=”484″ option3=”1089″ option4=”None of the above” correct=”option4″]
The correct answer is (d).
A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. A number that remains unchanged if its digits are reversed is called a palindromic number.
The only palindromic prime number between 10 and 40 is 111. However, the square of 111 is 12321, which is not a prime number.
Therefore, the square of a prime number between 10 and 40 that remains unchanged if its digits are reversed is not a prime number.