Multiple choice

(\text{Find the wrong term in following number series.})(3641 \quad 3659 \quad 3673 \quad 3721 \quad 3801 \quad 3921 \quad 4089)

  1. $4089$
  2. $3801$
  3. $3721$
  4. $3659$
  5. $3641$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The differences should follow a pattern where second differences are consecutive multiples of 8 (16, 24, 32, 40, 48). With 3659, the differences are 18, 14, 48, 80, 120, 168, which breaks the pattern. If 3659 is replaced with 3649, the differences become 8, 24, 48, 80, 120, 168, giving second differences of 16, 24, 32, 40, 48.

Keep practicing — related questions