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Topic: How many nines? (Read 11067 times) |
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cartoonle
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How many nines?
« on: Dec 6th, 2012, 11:51pm » |
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An easy one ... 
Some street has 100 buildings. If you want to tag all buildings with numbers from 1 to 100, how many nines (digit) would you need?
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towr
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Re: How many nines?
« Reply #1 on: Dec 7th, 2012, 4:56am » |
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You could just use sixes and turn them upside down.
So anything form 0 to 40
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Grimbal
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Re: How many nines?
« Reply #2 on: Dec 7th, 2012, 8:38am » |
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Is it that small street where the 4 house belong to hard-core geeks?
PS: I guess they would have started from 0.
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| « Last Edit: Dec 7th, 2012, 8:39am by Grimbal » |
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Grimbal
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Re: How many nines?
« Reply #3 on: Dec 7th, 2012, 8:46am » |
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Another thought:
are we free to tag the houses with any number from 1 to 100, or is it requested to use each number once and only once. And only one number per house?
I also would ask about tagging them in ascending order from one end to the road to the other end, but that was definitely not asked. Only an overly pedantic mind would only consider that possibility.
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| « Last Edit: Dec 7th, 2012, 8:47am by Grimbal » |
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rmsgrey
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Re: How many nines?
« Reply #4 on: Dec 10th, 2012, 5:02am » |
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on Dec 7th, 2012, 8:46am, Grimbal wrote:| I also would ask about tagging them in ascending order from one end to the road to the other end, but that was definitely not asked. Only an overly pedantic mind would only consider that possibility. |
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Particularly considering that there are several different schemes used to assign numbers - here in the UK, the default is to have odd numbers on one side and even on the other, but it's also not uncommon to increase consecutively on one side and decrease on the other (so one end of the road has the highest number across from the lowest, while the other end has a consecutive pair across from each other - or it's a cul-de-sac and numbers just continue round the end). Weirder schemes also exist.
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cartoonle
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Re: How many nines?
« Reply #5 on: Dec 10th, 2012, 5:19am » |
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It seems that towr always covers all possible options .
And yes we are talking about normal tagging ... numbers are not repeating, ascending, starting from 1, ...
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Rivaa
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Re: How many nines?
« Reply #6 on: Dec 10th, 2012, 8:39pm » |
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we can tag all buildings without using the nine digit
we can tag like this 1A, 1B, 1C........ 1Z and so on!
we can tag all buildings without using the nine digit
we can tag like this 1A, 1B, 1C........ 1Z and so on!
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cartoonle
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Re: How many nines?
« Reply #7 on: Dec 11th, 2012, 12:26am » |
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it was said that you must use numbers (and only numbers) ... no letters
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Rivaa
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Re: How many nines?
« Reply #8 on: Dec 11th, 2012, 5:21am » |
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Ok than the answer is 20..........?
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cartoonle
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Re: How many nines?
« Reply #9 on: Dec 11th, 2012, 7:42am » |
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on Dec 11th, 2012, 5:21am, seo@rivaa.in wrote:| Ok than the answer is 20..........? |
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correct, five points
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marlonmark
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Re: How many nines?
« Reply #10 on: Jan 2nd, 2013, 2:18am » |
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Answer is 20 count it like: 9,19,29,39,49,59,69,79,89,90,91,92,93,94,95,96,97,98,99 has two 9's.
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Rosiethomas
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Re: How many nines?
« Reply #11 on: Jul 1st, 2013, 3:50am » |
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"100/9 + 100/81 = 11 + 1 = 12
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| « Last Edit: Jul 2nd, 2013, 8:44am by Grimbal » |
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rmsgrey
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Re: How many nines?
« Reply #12 on: Jul 1st, 2013, 5:04am » |
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on Jul 1st, 2013, 3:50am, Rosiethomas wrote:"100/9 + 100/81 = 11 + 1 = 12
**SPAM LINK**
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Right answer to the wrong question. I smell a failed Turing test.
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sanaya
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Re: How many nines?
« Reply #13 on: Sep 2nd, 2013, 5:39am » |
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Nines will appear 12 times
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rmsgrey
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Re: How many nines?
« Reply #14 on: Sep 2nd, 2013, 9:29am » |
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on Dec 7th, 2012, 4:56am, towr wrote:You could just use sixes and turn them upside down.
So anything form 0 to 40 |
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I get anywhere from 0 to 4000...
I don't know why you'd want to tag each building with all 100 numbers, but...
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swapnilraja1212
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Re: How many nines?
« Reply #15 on: Sep 3rd, 2013, 2:15am » |
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there would be 10 times 9 digit for naming....
9, 19, 29, 39, 49, 59, 69, 79, 89, 99
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rmsgrey
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Re: How many nines?
« Reply #16 on: Sep 3rd, 2013, 7:38am » |
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on Sep 3rd, 2013, 2:15am, swapnilraja1212 wrote:there would be 10 times 9 digit for naming....
9, 19, 29, 39, 49, 59, 69, 79, 89, 99 |
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I count 11 '9' digits in that list...
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Grimbal
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Re: How many nines?
« Reply #17 on: Sep 8th, 2013, 5:44am » |
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on Sep 3rd, 2013, 2:15am, swapnilraja1212 wrote:there would be 10 times 9 digit for naming....
9, 19, 29, 39, 49, 59, 69, 79, 89, 99 |
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What happened to 90, 91, 92... ?
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towr
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Re: How many nines?
« Reply #18 on: Sep 8th, 2013, 6:57am » |
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on Sep 8th, 2013, 5:44am, Grimbal wrote:| What happened to 90, 91, 92... ? |
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Oh, come on, now you're just making up numbers
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Nursejim
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Re: How many nines?
« Reply #19 on: Sep 16th, 2013, 12:31pm » |
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This forum is sooo funny. We all make things way harder than they need to be sometimes!
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webtasarim
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Re: How many nines?
« Reply #20 on: Oct 6th, 2013, 4:15pm » |
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20 , 9 digits
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aiyanct
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Re: How many nines?
« Reply #21 on: Nov 29th, 2013, 11:20pm » |
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Total 9's are 19
Here are the explaination:
9
19
29
39
49
59
69
79
89
90
91
92
93
94
95
96
97
98
99
That's it...........
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rmsgrey
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Re: How many nines?
« Reply #22 on: Nov 30th, 2013, 7:41am » |
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on Nov 29th, 2013, 11:20pm, aiyanct wrote:Total 9's are 19
Here are the explaination:
9
19
29
39
49
59
69
79
89
90
91
92
93
94
95
96
97
98
99
That's it........... |
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I tried typing out that list only using the nine key nineteen times and got:
9
19
29
39
49
59
69
79
89
90
91
92
93
94
95
96
97
98
9
before running out.
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rloginunix
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Re: How many nines?
« Reply #23 on: Nov 30th, 2013, 12:31pm » |
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May I suggest looking at this problem from a different perspective. Namely, using less than base ten notation - digits 0 through 8 only. You can then number all the buildings without any nines at all.
For example, a building number 100 (in decimal) would carry a sign of 1100100 in binary.
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Grimbal
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Re: How many nines?
« Reply #24 on: Dec 2nd, 2013, 1:21am » |
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Or assume 1 and 100 are already in binary.
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