Multiple choice

Find the wrong term in sequence : 4, 9, 16, 25, 49, 121

  1. 4

  2. 9

  3. 16

  4. 121
Reveal answer Fill a bubble to check yourself
C Correct answer
AI explanation

The terms in the sequence are based on the squares of prime numbers: $2^2 = 4$, $3^2 = 9$, $5^2 = 25$, $7^2 = 49$, and $11^2 = 121$. The number 16 is not the square of a prime number and disrupts this progression. The correct term at this position should be the square of the next prime, which is $7^2 = 49$, proving that 16 is the wrong term in the sequence.

Keep practicing — related questions