Multiple choice

Find the odd one out.

  1. 5, 25

  2. 4, 12

  3. 7, 49

  4. 9, 81

  5. 11, 121

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In all other options, the second number is the square of the first number except this option. The square of 4 is 16 and not 12.