Hello,
You can notice that 15=3x5
This means that for all n > (or equal) 5, n! will contain 15 in its factors.
So we know that (5!+6!+...+100!) is a multiple of 15.
1!+2!+3!+4!=1+2+6+24=33
--> the remainder is 3.
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shinhidora production
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what is the remainder when 
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