0
Anonymous
14
* * * * *
Wrong! There are 15.
4 combinations of 1 number,
6 combinations of 2 number,
4 combinations of 3 numbers, and
1 combination of 4 numbers.
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15
7^2=49
30
3 x 7 x 7
(7 x 4) + 3 - 7 = 28 + 3 -7 = 24