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  #71  
Old Nov 7th 2008, 09:00 PM
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Default Re: Brain Teasers & Riddles

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Originally Posted by dilettante View Post
I can get it down to 7.

Races 1-5: Divide horses into sets of 5 (A-E) and race them, eliminate all fourth and fifth place finishers immediately. We can now rank the 3 remaining horses of each group internally.- down to 15 horses.

Race 6: Race the winners of the first 5 races. Lets say the winner of group A places first, the winner of group B second, the winner of group C third...etc. Eliminate groups D and E entirely. Eliminate all but the fastest horse (the one who just raced) in group C. - down to 7 horses.

We know the winner of the last race (the fastest in group A) is THE fastest horse, so we can set him aside; now we just need to find the other two. We also know that the slowest horse of the 3 in group B cannot be among the 3 fastest, so we eliminate him. That gives us 5 horses left to race.

Race 7: Race those five (the 2nd and 3rd place finishers from group A, the 1st and 2nd place finishers from group B, and the only remaining horse in group C). The top two finishers and the horse we set aside earlier are the 3 fastest.
Correct!

You're up...
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  #72  
Old Nov 8th 2008, 12:07 PM
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Default Re: Brain Teasers & Riddles

Potatoes are 99% water and one percent...well...potato flesh. So, lets say you took 100 pounds of potatoes and totally dehydrated them. What you had left would weigh about 1 pound.

Now, what if you took 100 pounds of potatoes and only slightly dehydrated them so that, when you were finished, they were only 98% water. How much would the potatoes weigh then?
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  #73  
Old Nov 8th 2008, 01:48 PM
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Default Re: Brain Teasers & Riddles

99 pounds?
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  #74  
Old Nov 8th 2008, 02:00 PM
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Default Re: Brain Teasers & Riddles

50 pounds
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  #75  
Old Nov 8th 2008, 05:08 PM
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Default Re: Brain Teasers & Riddles

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50 pounds
Correct!

If the potatoes are 98% water then the 1 pound of potato flesh must make up 2% of the total weight. 1 is 2% of 50 :. the total weight is 50 pounds.

You're turn.
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  #76  
Old Nov 9th 2008, 07:56 PM
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Default Re: Brain Teasers & Riddles

Oh, lol. I'm having a rough week for brain teasers...
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  #77  
Old Nov 10th 2008, 07:11 PM
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Default Re: Brain Teasers & Riddles

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Originally Posted by drgoodtrips View Post
Oh, lol. I'm having a rough week for brain teasers...
Picked a bad week to stop snorting glue?

Anyways, 24-hour rule again... (Dominick is predictable here...)

This riddle is a repeat - it wasn't solved at the time of the 'great crash'. Here is again for a return engagement!

* * *

I went into the forest and I got it. When I got it I looked for it, but couldn't find it, so I brought it home in my hand.
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  #78  
Old Nov 10th 2008, 11:25 PM
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Default Re: Brain Teasers & Riddles

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I went into the forest and I got it. When I got it I looked for it, but couldn't find it, so I brought it home in my hand.
A splinter?
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  #79  
Old Nov 11th 2008, 10:32 AM
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Default Re: Brain Teasers & Riddles

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A splinter?
Correct!

You're up...
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  #80  
Old Nov 11th 2008, 12:06 PM
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Default Re: Brain Teasers & Riddles

On a recent Saturday afternoon, I saw a boy and his mother at the neighborhood diner where I often go for lunch. From my vantage point I could see they were working on some arithmetic problems. The problems seemed simple enough and the kid was getting all the correct answers. For example, the first one was 25 + 8 and he wrote down 33. And the next one was 12 + 5 and he wrote down 17. The next was 35 + 13 and he wrote 48. Then his mother posed the last two problems. 45 - 8. The boy said 47 but I thought the answer was 37. The next one was 42 + 15. The boy said 43. I thought it should have been 57. His mother accepted both of those answers. When I saw how the kid was dressed, I did too. What was going on?
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