|
The number 64 is easily expressed as a result of calculation with four fours: (4 + 4) x (4 + 4), and with three fours: 4 x 4 x 4. But how can you express 64 with only two fours?
The mathematical signs you can use are addition, subtraction, multiplication, division, square root(√ ), decimal points, and the factorial sign (!) (For example: 4! = 4 x 3 x 2 x 1 = 24).
|