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Best Answer

Proof:

First, we conduct prime numbers.

1=2-1

2

3=4-1

4

5=2-3*(-1)

7=4-3*(-1)

11=4*2-3*(-1)

13=4*(-3)+2-1

Then

6=32=(4-1)2

8=4*2

9=(-3)2

10=2*5=2*2-3*(-1)

12=3*4

14=7*2

15=5*3

16=8*2

31 =42*2-1

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12y ago
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Q: How do you get the numbers 1 to 31 or just 16 and 31 using the numbers -1 2 -3 and 4?
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