general math MCQ #783

Least perfect square number, exactly divisible by 21, 36 and 56 is_________?

general math MCQ #783

  1. Question 1

    Q1. Least perfect square number, exactly divisible by 21, 36 and 56 is_________?

    • A) 3600
    • B) 504
    • C) 441
    • D) 7056

    Answer: 7056

    Explanation: LCM(21, 36, 56) = 504 = 2³ × 3² × 7; to make it a perfect square, multiply by 2 × 7 = 14, giving 504 × 14 = 7056.