Combining Digits – Four 4’s
Here are some ways to get 0 and 1 using four 4’s.
0 = 4 – 4 + 4 -4
0 = 44 – 44
1 = 4 / 4 * 4 / 4
1 = 4 / 4 + 4 – 4
1 = 44 / 44
THE CHALLENGE
How many numbers can you get using four 4’s using addition, subtraction, multiplication, division and creating double-digit numbers?
Notes
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THE CHALLENGE
Here are some solutions, with a few missing, from 0 to 16. Of course, there are many more. Have fun comparing different people’s solutions!
0 = 4 – 4 + 4 -4
1 = 4 / 4 + 4 – 4
2 = 4 / 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 + 4 – (4 / 4)
8 = (4 + 4) + 4 – 4
9 = 4 + 4 + (4 / 4)
10 = (44 – 4) / 4
11 =
12 = 4 * (4 – 4 / 4)
13 =
14 =
15 = 4 * 4 – (4 / 4)
16 = 4 * 4 + 4 – 4