Question 421002

Number should be divisible by 4 and 9, it means number must be divisible by LCM of 

these numbers, i.e 36.

so, firstly we find the smallest number which is greater than or equal to  500 and 

divisible by 36, it is 504.

so, 504, 504 +36, ...........

now, numbers are 504, 540, 576.

so, required number = 3 .


here required numbers are few so find it very easily.

otherwise, you have to do some more task.........

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