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Find all positive integers n, less than 17, for which n! is an integral multiple of 49.

 Jan 14, 2021
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14!     15!       16!       are all  integral multiples of 49

 

(they all contain 14 * 7 =  2 * 7^2  =  2 * 49  which is a multiple of 49)

 

 

cool cool cool

 Jan 14, 2021

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