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Here we will see how to check a number is divisible by 5 or not. In this case the number is very large number. So we put the number as string.

To check whether a number is divisible by 5, So to check divisibility by 5, we have to see the last number is 0 or 5.

#include <bits/stdc++.h> using namespace std; bool isDiv5(string num){ int n = num.length(); if(num[n - 1] != '5' && num[n - 1] != '0') return false; return true; } int main() { string num = "154484585745184258458158245285265"; if(isDiv5(num)){ cout << "Divisible"; }else{ cout << "Not Divisible"; } }

Divisible

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