Multiple choice

Directions: In the following number series, one number is wrong. Find out the wrong number. 145, 290, 870, 3480, 17500, 104400

  1. 290

  2. 870

  3. 3480

  4. 17500

  5. 104400
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern is: 145 * 2 = 290, 290 * 3 = 870, 870 * 4 = 3480, 3480 * 5 = 17400. The term 17500 is incorrect; it should be 17400.

AI explanation

The series follows a pattern where each term is multiplied by consecutive even numbers starting from 2. The multipliers are 2, 3, 4, 5 and 6, meaning the correct multipliers should be 2, 4, 6, 8 and 10. Applying this, 3480 multiplied by 8 gives 27840, which means the number 17500 is the wrong number.

Keep practicing — related questions