Sure, using the number 4 four times, you can create the numbers 1 to 20 as follows:
1 = 4 / 4 + 4 - 4 2 = 4 / 4 + 4 / 4 3 = 4 - 4 / 4 + 4 4 = 4 + 4 - 4 - 4 5 = 4 + 4 / 4 6 = 4 + 4 - 4 / 4 7 = 4 + 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 + 4 + 4 + 4 13 = (4 + 4) / 4 + 4 14 = 4 * 4 - 4 / 4 15 = 4 + 4 + 4 + 4 - 4 16 = 4 * 4 - 4 + 4 17 = 4 * 4 + 4 / 4 18 = (4 + 4) * (4 - 4) 19 = 4 * 4 + 4 - 4 20 = 4 * 4 + 4 / 4
to get 31 using the number 4 exactly 4 times, you can do: (4! + 4)/4 + 4!4! is four factorial, which is 4x3x2x1, which is 24. So you have 24 + 4 = 28, /4 = 7, + 24 = 31.
6.739986667E66 You would do two to the power of 222
5*(5*5 - 5) = 5*(25 - 5) = 5*20 = 100
543,210. If you can use them all multiple times, then it is 555,555.
use the digit 8 four time to make 89
You divide 7 by 4 which is 1.75.
3*3 + 3/3 = 10
As a solution to the four fours problem (using the number four no more than four times to come up with the solution, 31 is equal to (4!+4)/4+4!
4+4-4=4
How about 4 times 7 is 28 and 8 divded by 2 is 4
fourteen take away four and then add a four and times by (2 times 4)
(44 - 4) / 4
4 x 5 = 20.
eleven to the power of eleven
99 divided by 0.99
5*4+3+2
4! - 4 + 4/4