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11 = ((5!)/(7+3))-1
12 = (5!)/((7+3)^1)
13 = ((5!)/(7+3))+1
14 = 7-1+3+5
15 = 1*3+5+7
16 = 1+3+5+7
17 = 3*7+1-5
18 = (3!)+7+5^1
19 = (3!)+7+5+1
20 = 3*7-1^5
Last edited by Daithi; 04-05-2012 at 12:18 AM.
Reason: not sure order of operations on factorials so I added parenthesis to play it safe
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