Aki Posted May 25, 2005 Report Share Posted May 25, 2005 I am going to start this thread for math riddles. I think we need to add some humour to the forum. So I'm going to start with this riddle (I'm sorry if this is lame) What holds a square in its place? Quote Link to comment Share on other sites More sharing options...
Buffy Posted May 25, 2005 Report Share Posted May 25, 2005 Uh, its "roots"? Cheers,Buffy Quote Link to comment Share on other sites More sharing options...
C1ay Posted May 25, 2005 Report Share Posted May 25, 2005 How do you arrange 6 9s so that they equal 100? (you can use addition, divistion, decimals... just no other digits) Quote Link to comment Share on other sites More sharing options...
MortenS Posted May 25, 2005 Report Share Posted May 25, 2005 How about this:999/9 - 99/9 which equals 111 - 11 = 100 Dang that was 7... Quote Link to comment Share on other sites More sharing options...
C1ay Posted May 25, 2005 Report Share Posted May 25, 2005 Dang that was 7...It can be done with 6..... Quote Link to comment Share on other sites More sharing options...
MortenS Posted May 25, 2005 Report Share Posted May 25, 2005 I am on it... here is next try: (9*9) + (9+9) +( 9/9) 81 + 18 + 1 Now that is 6...and it should be 100. Quote Link to comment Share on other sites More sharing options...
C1ay Posted May 25, 2005 Report Share Posted May 25, 2005 Ahh, so there is more than one way to do it. Quote Link to comment Share on other sites More sharing options...
Biochemist Posted May 25, 2005 Report Share Posted May 25, 2005 I got mortens' solution. If a chicken and a half can lay an egg and a half in a day and a half, how long does it take for ten chickens to lay ten eggs? Do not answer if you solved this before!!!! Quote Link to comment Share on other sites More sharing options...
C1ay Posted May 25, 2005 Report Share Posted May 25, 2005 An alternate solution is 99 + 99/99 <--- highlight for spoiler Quote Link to comment Share on other sites More sharing options...
Qfwfq Posted May 26, 2005 Report Share Posted May 26, 2005 The one I found first is yet different: (9 + 9/9)*(9 + 9/9) <--- highlight for spoiler how long does it take for ten chickens to lay ten eggs?A day and a half!!! <--- highlight for spoiler Quote Link to comment Share on other sites More sharing options...
C1ay Posted May 26, 2005 Report Share Posted May 26, 2005 How much dirt is in a hole 6 and a half feet wide, 8 feet deep, and 5 feet long? Quote Link to comment Share on other sites More sharing options...
Qfwfq Posted May 27, 2005 Report Share Posted May 27, 2005 If it's a hole, I guess there ain't much dirt in it... Quote Link to comment Share on other sites More sharing options...
nkt Posted May 27, 2005 Report Share Posted May 27, 2005 If it's a hole, I guess there ain't much dirt in it......is the right answer! (and if you highlight it, you will see some text, too!) If Viv is 11, why is Dave 505? Quote Link to comment Share on other sites More sharing options...
infamous Posted May 27, 2005 Report Share Posted May 27, 2005 How much dirt is in a hole 6 and a half feet wide, 8 feet deep, and 5 feet long? Absolutely NO DIRT , but it would however contain, 260 cubic feet of air. Quote Link to comment Share on other sites More sharing options...
Qfwfq Posted May 27, 2005 Report Share Posted May 27, 2005 I can understand Dave being 505, although normally Dv would be, but I fail to understand Viv being 11. Viv could be 9, although normally Ix would be, or perhaps Viv could be 515, although normally Dxv would be.... :naughty: Quote Link to comment Share on other sites More sharing options...
Qfwfq Posted May 27, 2005 Report Share Posted May 27, 2005 Ah, yes, of course, Viv could even be 11, even though normally Xi would be. Quote Link to comment Share on other sites More sharing options...
nkt Posted May 27, 2005 Report Share Posted May 27, 2005 Ah, yes, of course, Viv could even be 11, even though normally Xi would be. Yes, VIV is 11, because you are simply adding the roman numerals. I didn't want to get too obscure! I don't know anyone called Xi, either. Actually, it *is* a Chinese name... but it wouldn't work so well for the slight misdirection... Quote Link to comment Share on other sites More sharing options...
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