1 2 3 4 5 6 7 8 9 10
1 2 6 24 120 720 5,040 40,320 362,880 3,628,806
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Hint: !
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Solution: ! is a factorial. A factorial means you should take that number and multiply by the numbers before it:
1!=1. 2!=2x1=2. 3!=3x2x1=6. 4!=4x3x2x1=24. 5!=5x4x3x2x1=120, and so on.
Zero is different though. Instead 0!=1 for some strange reason.(The same as 1!)
I got this problem from the puzzle "How can you use 5 0's to get 120 using any math equation?" The answer was this: (0! + 0! + 0! + 0! + 0!)! which made (1 + 1 + 1 + 1 + 1)! and then 5! which made 120.
