In a straight line, 5! = 5*4*3*2*1 = 120 ways.
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how many ways can 8 letters be arranged
The number of permutations of the letter ABCDEF is 6 factorial, or 720.
4! = 24, they can be arranged in 24 different ways
They can't be arranged in a million different ways!
There are 1,663,200 ways.