Selected MCQ

Current Question
If the HCF of two numbers is 5 and their LCM is 120, what is the sum of the numbers if one is 25?
  • A. 55
  • B. 65
  • C. 35
  • D. 45
Correct Answer: A
Explanation:
Product = HCF × LCM → numbers = 25 and 30.
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 consecutive odd integers have a sum such that the last two exceed the first by 13. Find numbeRs.
  • A. 9,11,13
  • B. 11,13,15
  • C. 13,15,17
  • D. 7,9,11
Correct Answer: D
Explanation:
Solve a linear relation.
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
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.