Math Riddles

 
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Question: If you randomly choose one of the following answers to this question, what is your chance of getting it right?

A) 50%
B) 25%
C) 0%
D) 25%

Answer: 0%. No matter which answer you choose you are incorrect. All of the answers create a logic loop.

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Question: What 3 positive numbers give the same result when multiplied and added together?

Answer: 1, 2, and 3.

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Question: There is a chain nailed to the wall. The chain is 10 feet long and the center of the chain dips down 5 feet from where each side of the chain is nailed to the wall. How far are the 2 ends of chain from each other?

Answer: Both ends are nailed with the same nail. In order for the 10 foot chain to dip down 5 feet it must dip 5 feet down and 5 feet up, totaling the length of the chain.

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By David Pleacher

Question: Does a pound of gold or a pound of feathers weight more?

Answer: The feathers. A pound of feathers is measured in avoirdupois weight, in which one pound equals 16 ounces. Precious metals are measured in troy weight, in which one pound equals 12 ounces.

However, the ounces are not measured in the same way. In avoirdupois weight, one ounce = 437.5 grains. In troy weight, one ounce = 480 grains.

So, one pound of feathers weighs (16)x(437.5 grains) = 7,000 grains. One pound of gold weighs (12)x(480 grains) = 5,760 grains.

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Question: If 1/2 of 5 is 3, then what is 1/3 of 10?

Answer: 4 (think proportions).

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