Selected MCQ

Current Question
If x% of 200 equals y% of 250, find the ratio x:y.
  • A. 5:4
  • B. 5:2
  • C. 2:5
  • D. 4:5
Correct Answer: D
Explanation:
x/100 × 200 = y/100 × 250 ⇒ 2x = 2.5y ⇒ x:y = 4:5.
Related Question 1
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.
Related Question 2
Sum of two numbers is 2490. 6.5% of one equals 8.5% of the other. Find numbeRs.
  • A. 989,1501
  • B. 1011,1479
  • C. 1401,1089
  • D. 1411,1079
Correct Answer: D
Explanation:
Solve the ratio Equation.
Related Question 3
Ratio of speed of boat to stream is 36:5. Time downstream is 5h 10min. Find upstream time.
  • A. 5h 50m
  • B. 6h
  • C. 6h 50m
  • D. 12h 10m
Correct Answer: C
Explanation:
Use the ratio method for speeds.
Related Question 4
A loan of Rs. 1200 at simple interest equals years equal to rate. Find rate.
  • A. 3.6
  • B. 6
  • C. 18
  • D. Cannot determine
Correct Answer: B
Explanation:
The SI formula gives a rate of 6%.
Related Question 5
A rhombus has an area of 144 sq cm and diagonals in the ratio 1:2. Find the diagonals.
  • A. 24 cm, 48 cm
  • B. 12 cm, 24 cm
  • C. 6√2 cm, 12√2 cm
  • D. 6 cm, 12 cm
Correct Answer: B
Explanation:
Area = (d1 × d2)/2 yields diagonals 12 and 24.