A little problem...
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A little problem...
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LolBbq


Advanced Member


Joined: 08 Apr 2006
Posts: 351
Posted: 28 Jan 2007 07:25:55 am    Post subject:
Math Competition Exercise wrote:
What is the smallest prime number that divides the sum 1167+1391?

I have thought it over for quite a while, and the slightest idea that I got was to change the original expression into (12-1)67+(12+1)91. Is that a good start?

Last edited by Guest on 28 Jan 2007 07:26:32 am; edited 1 time in total
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CoBB


Active Member


Joined: 30 Jun 2003
Posts: 720
Posted: 28 Jan 2007 08:24:14 am    Post subject:
It’s the sum of two odd numbers, so the answer is two.
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LolBbq


Advanced Member


Joined: 08 Apr 2006
Posts: 351
Posted: 28 Jan 2007 08:42:50 am    Post subject:
Is that it? No algorithms or factoring required? Thanks CoBB!
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