How do you make the number 1-20 using only 4 4s with the simplest of equations?

Answer 1

I am doing the same thing. I only have answers with the square root thing on it sorry! Maybe you will be allowed it though :S

0 = (4 + 4) - (4 + 4)

1 = (4 + 4) / (4 + 4)

2 = (4 x 4 ) / (4 + 4)

3 = (4 + 4 + 4) / 4

4 = 4 + 4 - √4 - √4

5 = √4 + √4 + {4/4}

6 = 4 + √4 + 4 - 4

7 = 4 x √4 - {4/4}

8 = 4 + 4 + 4 - 4

9 = 4 + 4 + {4/4}

10 = 4 + 4 + 4 - √4

11 = 4 / {√4 - (4/4)}

12 = {4 x 4} - √4 - √4

13 = 4! - {√4 + (4/4)}

14 = 4 + 4 + 4 + √4

15 = {4 x 4} - {4/4}

16 = {4 x 4} + 4 - 4

17 = {4 x 4} + {4/4}

18 = {4 x 4} + 4 - √4

19 = 4! + 4- (4/4)

20 = {4 x 4} + √4 + √4

Sorry about the highlighting ... if it actually shows up??? ! mean to the power of 2. / means divide. Hope it helps it doesn't help me... :) :S :(

Answer 2

18