| By Rmac43 (Rmac43) on Thursday, October 07, 2004 - 07:49 pm: Edit |
How many integers between 10 and 100 have exactly one digit equal to 3?
Thanks
| By Adidasty (Adidasty) on Thursday, October 07, 2004 - 07:57 pm: Edit |
13, 23, 30, 31, 32, 34 (see not 33 because 33 has TWO digits equal, not one. and they said EXACTLY one) , 35, 36, 37, 38, 39, 43, 53, 63, 73, 83, 93.
so 17 is the answer
| By Legendofmax (Legendofmax) on Thursday, October 07, 2004 - 07:57 pm: Edit |
Well you have 13, 23, 43, 53, 63, 73, 83, 93, 30, 31, 32, 34, 35, 36, 37, 38, and 39. Am I missing any? Should be 17.
| By Rmac43 (Rmac43) on Thursday, October 07, 2004 - 08:00 pm: Edit |
haha, wow - thanks. I found my mistake. I had listed the numbers and counted only 16 - i just looked at my list and it turns out i unknowingly skipped 30.
| By Jm2006 (Jm2006) on Thursday, October 07, 2004 - 08:01 pm: Edit |
That's what I got.
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