In detail

Playing with the calculator

Playing with the calculator

Replace the questions in the following expression with the basic mathematical signs (+, -, *, /) so that each one appears only once. The goal is to find the largest possible number and the lowest number we can get:

3 ? 7? 5 ? 4 ? 3 = X

Solution

The maximum value we can obtain is:
3 / 7 + 5 * 4 - 3 = 18,71

And the minimum value is:
3 / 7 - 5 * 4 + 3 = -15,29