Question

Using four 4's bring an answer equal to 20 and also use the four mathematical signs i.e plus, minus, divide & multiply only once. Can you solve it?​

Answer 1

{4 tens + 4 - 4 }÷√4 ( 4tens consist of multiplication operator)

= 40 ÷ √4

= 20

OR

{(4! ÷ √4 ) x √4 } + ( — 4)

=12 x 2 — 4

= 20