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Matt71
How many times does the digit 1 appear in the number 500, solution please
Nonononono, I mean 1,2,3,4,5....500
oooooooooo 1,11,12,13,14,15,16,17,18,19,21,31,41,51,61,71,81,91,101,111,112,113,114,115,116,117,118,119,121,131,141,151,161,171,181,191...........
@sriram how did you work that out?
Yeah How did you work that out so fast
i don't understand the question there is no digit 1 in 500 500 has the digits 5, 0 (multiplicity 2)
the question is the numbers 1-500
ihe meant 1 to 500 @myininaya
@myininaya He meant in the range 1,2,...,500
bob96 can you help me in math?
http://au.answers.yahoo.com/question/index?qid=20100908033614AADkMBv
@pokemon sure but make it fast ;)
look from 1 to 100 10 digits end wid 1 (,1,11,21,31...91 n 10 srart wid 1 (10,11,12...19) hence 20 1,s from 1to 99 same for 200 to 299 and 300 to 399 & 400 to 500 bt100 to 199 20 ones wid 100 ones in hundreds place hence 20*5 +100=200 previous ans wrong
good answer, but you got a solution without using computers?
I've got a solution using computers :-D There's also an analytical solution without computers.
Well, got my answer thanks to all