To make 28 using the numbers 1, 2, 3, and 4, you can use the following mathematical operations: (4 x 3) + 2 + 1 = 12 + 2 + 1 = 15. Then, add 13 to 15 to get 28: 15 + 13 = 28.
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1234
to get the number 25 using 1234 = 31 - 2 - 4
4 + 3 + 2 - 1 = 8
24
It can be: 2*3+4+1 = 11