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Mathematics MCQs

In a school, 40% play football and 50% play cricket. If 18% play neither, what percentage play both?

  • A. 40%
  • B. 32%
  • C. 22%
  • D. 8%
Explanation:
Total playing at least one = 82%, so both = 40 + 50 − 82 = 8%.

Find the missing number in the series: 1, 6, 13, 22, 33, ____.

  • A. 36
  • B. 40
  • C. 46
  • D. 52
Explanation:
Differences increase by 2, 4, 6, 8, so next is +10 → 33 + 10 = 43 (but pattern actually +5, +7, +9, +11 → 46).

Find the average of the numbers: 312, 162, 132, 142, and 122.

  • A. 194
  • B. 174
  • C. 162
  • D. 186
Explanation:
Sum = 870, average = 870 ÷ 5 = 174.

Find the incorrect number in the series: 1, 1, 2, 6, 24, 96, 720, ____.

  • A. 6
  • B. 24
  • C. 96
  • D. 720
Explanation:
The pattern is a factorial sequence; 5! = 120, so 96 is incorrect.

Complete the series: 4, 8, 9, 13, 14, 18, ____.

  • A. 22
  • B. 32
  • C. 11
  • D. 19
Explanation:
The pattern alternates between +4 and +1, so the next is 18 + 1 = 19.