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Arte-miy333 [17]

3 years ago

5

I have a question on my problem of the week, it says if n=15!+35!,how many of the nine prime numbers less than 25 are divisors o

f n? I need help ASAP!!

1 answer:

xz_007 [3.2K]3 years ago

7 0

15!+35!=15!(1+(35!-15!)) so I believe 35!-15!+1 is a prime number so we just have to find the primes in 15! so 2,3,5,7,11,13

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