Selected MCQ

Current Question
The smallest fraction which divides 6/7, 5/14 and 10/21 exactly is ____.
  • A. 30/7
  • B. 30/98
  • C. 60/147
  • D. 50/294
Correct Answer: A
Explanation:
The LCM of the fractions is 30/7.
Related Question 1
Three dice are thrown. Probability that exactly two show same number is ____.
  • A. 5/9
  • B. 5/12
  • C. 1/36
  • D. 7/12
Correct Answer: B
Explanation:
Favorable outcomes = 90 → 90/216 = 5/12.
Related Question 2
Four prime numbers in ascending order have the smallest difference. Find the smallest.
  • A. 5
  • B. 7
  • C. 11
  • D. 13
Correct Answer: A
Explanation:
The closest primes start at 5.
Related Question 3
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.
Related Question 4
The smallest number which when increased by 1 is divisible by 12, 18, 24 and 32 is ____.
  • A. 1439
  • B. 1440
  • C. 1459
  • D. 1449
Correct Answer: A
Explanation:
LCM − 1 = required number.
Related Question 5
If a number is divided in the ratio 2:3, what fraction does the smaller part represent?
  • A. 2/5
  • B. 3/5
  • C. 1/2
  • D. 1/3
Correct Answer: A
Explanation:
Smaller part = 2/(2+3).