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  1. The least perfect square, which is divisible by each of 21, 36 and 66 is
    1. 214344
    2. 214434
    3. 213444
    4. 231444
Correct Option: C

LCM of 21, 36 and 66
∴ LCM = 3 × 2 × 7 × 6 × 11
⇒ LCM = 3 × 3 × 2 × 2 × 7 × 11
∴ Required number = 32 × 22 × 72 × 112
Required number = 213444


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