Selected MCQ

Current Question
A sphere is melted into 3 spheres. Diameters are given. Find the third diameter.
  • A. 2.66 cm
  • B. 2.5 cm
  • C. 3 cm
  • D. 3.5 cm
Correct Answer: B
Explanation:
Volume conservation applied.
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 cubes of sides 9, 12, and 15 cm are melted to form a new cube. Find its side.
  • A. 21 cm
  • B. 19 cm
  • C. 32 cm
  • D. 18 cm
Correct Answer: D
Explanation:
Total volume = cube of new side.
Related Question 3
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 4
Four prime numbers in ascending order, given the condition. Find the second number.
  • A. 17
  • B. 29
  • C. 23
  • D. 31
Correct Answer: B
Explanation:
Based on the given pattern.
Related Question 5
Value of the plant depreciates 10% annually. Find the present value after 2 years, given the initial amount.
  • A. Rs. 8000
  • B. Rs. 10000
  • C. Rs. 18000
  • D. Rs. 8100
Correct Answer: D
Explanation:
Value = P(0.9)².