Qudurat GAT Practice
ArithmeticQuestion 331 of 550

The mean of three numbers is 20. One is 15 and another is 18. What is the third number?

  1. 20
  2. 23
  3. 33
  4. 27
Show answer

Correct answer: 27

The sum of the numbers = 20 × 3 = 60. The third number = 60 − 15 − 18 = 27.

Test structure: ETEC guide to the GAT

Practice arithmetic

Questions last reviewed: 21 October 2026