Selected MCQ

Current Question
A vessel contains 90 litres. After removing and replacing milk, final quantity is ____.
  • A. 72
  • B. 72.9
  • C. 73.8
  • D. 74.7
Correct Answer: B
Explanation:
Replacement formula.
Related Question 1
A mixture of milk and water contains 20% water. How much water should be added to make it 25% ____.
  • A. 5%
  • B. 10%
  • C. 15%
  • D. Cannot be determined
Correct Answer: D
Explanation:
Initial quantity not given.
Related Question 2
Vessel P contains 62.5% alcohol, and Q contains 87.5%. If 2 L from P and 4 L from Q are mixed, find ratio of alcohol to water ____.
  • A. 16: 5
  • B. 14: 5
  • C. 16: 7
  • D. 19: 5
Correct Answer: D
Explanation:
Calculate the alcohol content and compare it with water.
Related Question 3
Two boys walk at 5 km/h and 5.5 km/h. Time difference after same distance is ____.
  • A. 17 hr
  • B. 14 hr
  • C. 12 hr
  • D. 19 hr
Correct Answer: A
Explanation:
Relative speed difference.
Related Question 4
Khadija’s age after 1 year is twice her age 10 years ago. Find the present age.
  • A. 19
  • B. 20
  • C. 21
  • D. 22
Correct Answer: C
Explanation:
Solve Equation.
Related Question 5
Three pipes fill a tank in 6 houRs. After 2 hours, one is closed. Remaining time is ____.
  • A. 10
  • B. 12
  • C. 14
  • D. 16
Correct Answer: C
Explanation:
Work-rate adjustment.