this question is from challenge

Question

#include <iostream>
using namespace std;

int main() {
int x=21,y=31 ,z;
z=(x%5)*9/(y%6)*9;
cout << z;
return 0;
}

//according to me answer should be 1 but it was showing 81

Answer 1

81 is the correct ans
(21%5)*9/(31%6)*9
1*9/1*9=81

Because multiplication and division have same priority so it execute left to right

Answer 2

brackets is the high priority and then * and /. first calculate inside the bracket and goes from left to right

Answer 3

@Mayur
1*9/1*9
9/1*9.
9*9. //9/1=9
81

Answer 4

thank u @mayur @silambarasan for your help

Answer 5

first division is done then multiplication is done
z=(21%5)*9/(31%6)*9
z=1*9/1*9
z=1*9*9
z=9*9
z=81

Answer 6

I was confused by the brackets

Answer 7

I got it

Answer 8

Nope answer is 81. Look into order of operations and operator precedence.
Parentheses come first:
(x%5) = 1
(y%6) = 1
results to:
1 * 9 / 1 * 9
Multiplication and Division have the same precedence so they evaluate left to right:
1 * 9 = 9
results to:
9 / 1 * 9
9 / 1 = 9
results to:
9 * 9 = 81

Answer 9

ok lets see
1*9/1*9 // here 9/1 is done first then other operations not multiplication like 1*9
=1*9/9
=1*1
=1

Answer 10

in 1st step why 1*9 done first