Selected MCQ

Current Question
252 expressed as product of primes is ____.
  • A. 2 × 2 × 3 × 3 × 7
  • B. 2 × 2 × 2 × 3 × 7
  • C. 3 × 3 × 3 × 3 × 7
  • D. 2 × 3 × 3 × 3 × 7
Correct Answer: A
Explanation:
Prime factorization.
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
Sum and product of roots of Equation x² + 20x + 3 = 0 are ____.
  • A. 10, 3
  • B. -10, 3
  • C. -20, 3
  • D. -10, -3
Correct Answer: C
Explanation:
Sum = −b/a, product = c/a.
Related Question 5
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.