Multiple choice

In the following number series only one number is wrong. Find the wrong number? $3 4 16 35 74 153$

  1. 4

  2. 16

  3. 35

  4. 74

  5. 153
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pattern is: multiply the previous number by 2, then add a number that increases by 1 each time. Starting from 3: 3 × 2 + 1 = 7 (not 4), then 7 × 2 + 2 = 16, 16 × 2 + 3 = 35, and so on. Since 4 breaks the pattern when all other numbers follow it correctly, 4 is the wrong number.

Keep practicing — related questions