Selected MCQ

Current Question
The product of two numbers is 36, and their HCF is 6. Their LCM ____.
  • A. 6
  • B. 12
  • C. 18
  • D. 36
Correct Answer: D
Explanation:
Product = HCF × LCM.
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
Sum of two numbers is 25, and the difference is 13. Find product.
  • A. 104
  • B. 114
  • C. 315
  • D. 325
Correct Answer: B
Explanation:
Solve simultaneous equations.
Related Question 3
Sum of squares of two consecutive integers exceeds product by 91. Find numbeRs.
  • A. 9,10
  • B. 10,11
  • C. 11,12
  • D. 12,13
Correct Answer: A
Explanation:
Form Equation and solve.
Related Question 4
The product of two numbers is 4107, and their HCF is 37. Find their LCM.
  • A. 101
  • B. 107
  • C. 111
  • D. 185
Correct Answer: C
Explanation:
LCM = 4107/37 = 111.
Related Question 5
The product of two numbers is 2028, and their HCF is 13. How many such pairs exist?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Correct Answer: B
Explanation:
Factorization yields two valid coprime pairs.