Question

How many numbers less than 10,000 are there
which are divisible by 21, 35 and 63?
(a) 33 (b) 32
(c) 38 (d) 37

Answer 1

First take smallest LCM of 21,35,63 which is 315

Now 10,000/315 = Near 31 Times so our answer is 31. 

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