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# Puzzle #29: Average Salary of 4 Employees Puzzle | Infosys

**How can four employees calculate the average of their salaries without knowing other’s salary?**

**Puzzle Solution:**

This solution has a limitation that information is partially passed and there needs some trust level.

**Salary of A: **i

**Salary of B:** j

**Salary of C: **k

**Salary of D:** l

A passes to B (i + a) where a is a number that A knows B takes this a passes to C (i + j + a + b). C takes this and passes to D (i + j + k + a + b + c). D takes this and passes to A (i + j + k + l + a + b + c + d)

Now one after another they remove their constants.

**Example:** A now passes to B: i + j + k + l + b + c + d (He has removed a)

B passes to C after removing his constant (b).

Thus Finally D gets x + y + z + u + d. He takes away his constant and now he has i + j + k + l.

So, the average is: **(i + j + k + l) / 4.**

Let us know if you know any other solution.

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