Multiple choice

Directions: Complete the following number series:

143, 221, 323, 437, 667, ?

  1. 253

  2. 391

  3. 899

  4. 713

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It is observable that the given pattern of this number series is the product of two consecutive prime numbers starting from 11, i.e. 11 x 13 = 143, 13 x 17 = 221, 17 x 19 = 323, 19 x 23 = 437, 23 x 29 = 667 and so on. Therefore, the next term of the series is 29 x 31 = 899.

Keep practicing — related questions