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Maths Tricks, Questions And Brain Teasers by sauer(m): 10:54pm On Jan 19, 2012 
High time we had something for maths peeps, if you know what I mean. This thread will provide socalled maths tricks for those who want to impress their bfs/gfs, questions for those who want a bit of some maths challenge, and brain teasers for those who sit all day on their computers. Please contribute and be creative, at least a little And will this be the first of its kind on NL? sauer! 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:02pm On Jan 19, 2012 
If you have three apples and you took away two, how many will you have? 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:04pm On Jan 19, 2012 
A guy can upload 1MB on the internet for 20mins. Another can upload the same 1MB for 15mins. What are the chances they can both upload a divisible 1MB file for 10mins, if they work together? 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:05pm On Jan 19, 2012 
sauer:two 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:06pm On Jan 19, 2012 
Natasha,,:wrong! you[b] took away[/b] two, remember? 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:08pm On Jan 19, 2012 
I was running in my head through my store of maths tricks and discovered: 3 can divide any number, which if you add its digits is divisible itself by 3 e.g 27/3 = 9, but then (2+7)/3 = 3! 393/3 = 131, and (3+9+3)/3 = 5! Try yours! 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:11pm On Jan 19, 2012 
in how many ways can you choose 5 moderators (3 for auto section and 2 for romance) on NL out of 20 applicants? Consider that 3 applicants are not qualified because they have been initially banned! 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:12pm On Jan 19, 2012 
In how many ways can you spell NAIRA, if N has to start and A has to end all the time!? 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:12pm On Jan 19, 2012 
sauer:you were the one who took the two away remember so you still have them with you 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:15pm On Jan 19, 2012 
Natasha,,:hmmm. . . .you never sharp reach! Yes, you have them with you. But cos you are "away", you aren't close to the remaining one. So, you have only two, not three! 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:15pm On Jan 19, 2012 
You are on an island in the middle of a lake. The lake is in a remote part of the country and there has never been a bridge connecting the island to the mainland. Every day a tractor and wagon gives hay rides around the island. Puzzled as to how the tractor had gotten onto the island, you ask around and find out that the tractor was not transported to the island by boat or by air. Nor was it built on the island. Explain how the tractor got there? 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:19pm On Jan 19, 2012 
sauer:you said ''you took them away'' now you said ''because you're away'' so did the apples go their own way? you took them away, they went with you 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:22pm On Jan 19, 2012 
Natasha,,:damn! did you change that answer or is it my eyes? clever girl! 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:23pm On Jan 19, 2012 
sauer:its your eyes lemme try another one 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:25pm On Jan 19, 2012 
Can you make four (4) nines (9) equal 100?? 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:26pm On Jan 19, 2012 
Natasha,,:lwkmd > on another note 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:27pm On Jan 19, 2012 
in how many ways can you arrange the word "RISE"? Preference not given to any particular word! 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:27pm On Jan 19, 2012 
sauer:the tractor was not on the island 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:29pm On Jan 19, 2012 
Natasha,,:okay, if it's not on the island, it rides around in the water abi? mtschew, you berra pay attention! 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:31pm On Jan 19, 2012 
Look at the picture and say the COLOR of the word, not the word itself. Difficult, ehn? plucked from: www.optillusions.com

Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:32pm On Jan 19, 2012 
sauer:one 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:34pm On Jan 19, 2012 
sauer:lol lemme think 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:35pm On Jan 19, 2012 
Natasha,,:one? when you have NAIRA, NARIA, NRIAA, . . . . . .come on, use permutation! 1 Like 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:36pm On Jan 19, 2012 
sauer:I did it, but hey it really got me at first 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:37pm On Jan 19, 2012 
sauer:Yes its just one, since you can't pronounce these words as Naira 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:45pm On Jan 19, 2012 
Natasha,,:hmmm. . . .well, the aim is not to make them pronounceable, just to have them! Brute force: NAIRA =NAIRA, NIRAA, NARIA, NRIAA, NIARA, NRAIA using permutation: place N and A at beginning and end of word respectively. There are two A's. Since they are indistinguishable, it changes nothing. Assuming no repetition then, the letters in the middle (3 of them) can be arranged in 3 x 2 x 1 ways. So we have 6 ways! If repetition were allowed, in which case the two A's are distinguishable (?), then just multiply answer by 2. So, we have 12 ways. Not a sane answer, though! 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:45pm On Jan 19, 2012 
sauer:how did I skip this? 99 + 9/9 =100 9/9=1 so 9 +1 =100 1 Like 
Re: Maths Tricks, Questions And Brain Teasers by eghost247(m): 11:46pm On Jan 19, 2012 
sauer:you stil have all your apples Joor 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:46pm On Jan 19, 2012 
Q: What 7 letter word becomes longer when the third letter is removed? A: Lounger **edited with answer** 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:47pm On Jan 19, 2012 
Natasha,,: hurray!!!! . She is clever after all 
Re: Maths Tricks, Questions And Brain Teasers by sauer(m): 11:47pm On Jan 19, 2012 
eghost247: 
Re: Maths Tricks, Questions And Brain Teasers by Natasha2(f): 11:48pm On Jan 19, 2012 
sauer:all right eghost247:lol its like you haven't eaten apples for a long time 
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