Not getting any approach to solve

#1

Please help me find the approach to this question

#2

Hi @Dave7
To solve this problem,well here’s something :

Number of numbers in the range [X, Y] divisible by Z is

(Y/Z) - (X/Z) , if X%Z != 0
(Y/Z) - (X/Z) + 1 , if X%Z == 0

#3

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