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  1. The smallest number, which when diminished by 3, is divisible by 21, 28, 36 and 45 is ?
    1. 420
    2. 1257
    3. 1260
    4. 1263
Correct Option: D

Required number = (L . C . M of 21, 28, 36, 45 ) + 3
= (1260 + 3 )
= 1263


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