Question

You have the digits $4,4,4$ and $4.$ You can use addition, subtraction, multiplication, and division. You must ultimately get $20.$ How do you do it?

Answer 1

We have the digits $4,4,4,4$

We can use the digits do like this to get $20.$

$4\times (\frac{4}{4}+4)$

$=4\times (1+4)$

$=4\times 5$

$=20$