Selected MCQ

Current Question
Find the incorrect number in the series: 1, 1, 2, 6, 24, 96, 720, ____.
  • A. 6
  • B. 24
  • C. 96
  • D. 720
Correct Answer: C
Explanation:
The pattern is a factorial sequence; 5! = 120, so 96 is incorrect.
Related Question 1
Find the missing number in the series: 1, 6, 13, 22, 33, ____.
  • A. 36
  • B. 40
  • C. 46
  • D. 52
Correct Answer: C
Explanation:
Differences increase by 2, 4, 6, 8, so next is +10 → 33 + 10 = 43 (but pattern actually +5, +7, +9, +11 → 46).
Related Question 2
Three numbers are co-prime. The product of the first two is 551. Find the third.
  • A. 75
  • B. 81
  • C. 85
  • D. 89
Correct Answer: C
Explanation:
Factorization approach.
Related Question 3
Three dice are thrown. Find the number of outcomes where the sum is 10.
  • A. 36
  • B. 81
  • C. 91
  • D. 116
Correct Answer: C
Explanation:
Count valid combinations.
Related Question 4
Three consecutive odd integers have a sum such that the last two exceed the first by 13. Find numbeRs.
  • A. 9,11,13
  • B. 11,13,15
  • C. 13,15,17
  • D. 7,9,11
Correct Answer: D
Explanation:
Solve a linear relation.
Related Question 5
Balls of different colors arranged. Find the number of arrangements.
  • A. 15
  • B. 18
  • C. 24
  • D. 30
Correct Answer: C
Explanation:
Permutations with repetition.