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.
Wiki User
∙ 10y ago15
7^2=49
30
3 x 7 x 7
(7 x 4) + 3 - 7 = 28 + 3 -7 = 24
15
7^2=49
30
3 x 7 x 7
You can make 4*3*2/2 = 12 numbers.
(7 x 4) + 3 - 7 = 28 + 3 -7 = 24
How about the prime numbers of: 3+7 = 10
2, 3, 7,
7
478, 487, 874, 847, 748, 784. (6)
1 + 2 + 3 + 4 + 5 + 6 + 7 + 2 + 3 + 4 = 37 note: there are many other variations/answers
2+3+7+9+3=24