Selected MCQ

Current Question
40 is subtracted from 60% of a number, and the result is 50. Find the number ____.
  • A. 150
  • B. 140
  • C. 130
  • D. 110
Correct Answer: A
Explanation:
0.6x − 40 = 50.
Related Question 1
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 2
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 3
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 4
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.
Related Question 5
Three numbers: 5/7 of the first equals 48% of the second, and the second is 1/9 of the third. Find first.
  • A. 168
  • B. 84
  • C. 42
  • D. 21
Correct Answer: D
Explanation:
Solve the proportion.