Selected MCQ

Current Question
If a² − 7a + 12 = 0 and b² − 3b + 2 = 0, then relation between a and b ____.
  • A. a < b
  • B. a ≤ b
  • C. Cannot be determined
  • D. a > b
Correct Answer: D
Explanation:
Solve both quadratics and compare roots.
Related Question 1
Two circles have a radius relation. Area of the square is 196 cm². Find radius.
  • A. 12π
  • B. 16π
  • C. 24π
  • D. 32π
Correct Answer: C
Explanation:
Side=14, radius=7×? → area relation.
Related Question 2
The time taken upstream is twice that downstream. Find the speed relation.
  • A. 12 km/h
  • B. 13 km/h
  • C. 14 km/h
  • D. 15 km/h
Correct Answer: C
Explanation:
Solve using the speed ratio method.
Related Question 3
The speed of a man rowing in still water is 15 km/h. If he rows downstream and upstream, find the time relation.
  • A. 10 sec
  • B. 15 sec
  • C. 20 sec
  • D. 12 sec
Correct Answer: D
Explanation:
Based on the speed relation between the stream and still water.
Related Question 4
If one number is 20% more than another, the ratio between them is ____.
  • A. 5:6
  • B. 6:5
  • C. 4:5
  • D. 5:4
Correct Answer: B
Explanation:
Let smaller = 5 → larger = 6.
Related Question 5
If the difference between compound and simple interest for 2 years is Rs. 50 on Rs. 1000, find the rate?
  • A. 5%
  • B. 10%
  • C. 7%
  • D. 8%
Correct Answer: A
Explanation:
Difference = P(R/100)² → R = 5%.