computing teh last digits without computing the number
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computing teh last digits without computing the number
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02/23/2009, 11:48 AM
guys how can i compute teh last digit of a number , resulting from tetration without computing the real number..
for example ...5||2 = 2^65536...how can i get the last digit of that number without computing it..teh last 8 digits for example ? 
02/23/2009, 01:21 PM
deepinlife Wrote:guys how can i compute teh last digit of a number , resulting from tetration without computing the real number..See here. Where do you guys get those questions? Is it a homework exercise or so? 
02/24/2009, 02:32 AM
bo198214 Wrote:Where do you guys get those questions? Is it a homework exercise or so? These questions are very common in contests, like the Putnam Competition. Andrew Robbins
02/24/2009, 09:09 AM
it is a problem in a site :
http://projecteuler.net/index.php?sectio...ems&id=214 |
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