Selected MCQ

Current Question
If 10% spent on rent and 20% of remainder on house, savings are ____.
  • A. Rs. 3600
  • B. Rs. 4000
  • C. Rs. 4500
  • D. Rs. 3000
Correct Answer: A
Explanation:
The remaining fraction gives Rs. 3600.
Related Question 1
12 children take 16 days to finish work. Time for the same work with a different number is ____.
  • A. 3 days
  • B. 4 days
  • C. 6 days
  • D. 8 days
Correct Answer: C
Explanation:
Work is inversely proportional.
Related Question 2
Three flags of different coloRs. Number of signals using 1 or more flags is ____.
  • A. 6
  • B. 9
  • C. 15
  • D. 18
Correct Answer: C
Explanation:
Total combinations excluding empty = 2³ −1.
Related Question 3
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 4
The speed of the boat in still water is 60 km/h, and the current is 20 km/h. Find downstream and upstream speeds.
  • A. 35, 25
  • B. 80, 40
  • C. 40, 60
  • D. 50, 55
Correct Answer: B
Explanation:
Downstream = 80, upstream = 40.
Related Question 5
The smallest number which when divided by 20, 25, 35 and 40 leaves remainder 9 is ____.
  • A. 1994
  • B. 1494
  • C. 1349
  • D. 1496
Correct Answer: C
Explanation:
LCM + remainder answers.