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RE: Brainsteem Mathematics Challenges: Factorial Sum
Very good, and legit method, but you've missed some solutions!
Upvoted all the same!
Very good, and legit method, but you've missed some solutions!
Upvoted all the same!
Hi, @rycharde, thank you for the problem and response. I should have triple checked before answering, especially when it was done by tapping solution on a phone and right before bed :p
The path 1-3 is flawed:
The last bit should be
2!+3!+3!=14, not a power of 2
2!+3!+4!=32 (2^5)
2!+3!+5!=128 (2^7)
Now the solution should be completed.
Thank you again for the interesting problem, I really enjoyed my time solving it ^_^
That's cool! We know that a,b and c cannot all be 3 or more, because the sum would then always be a multiple of 3, but one of them can be greater than 3.