Riddle:

What word doesn't belong in this group? That, hat, what, mat, cat, sat, pat, or chat?

What. It's pronounced differently; all of the others rhyme.

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Riddle:

Which bird does not belong in this group? Finch, gull, eagle, ostrich, or sparrow?

The Ostrich. It's the only bird that doesn't fly.

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Riddle:

If someone says to you, "I'll bet you \$1 that if you give me \$2, I will give you \$3 in return", would this be a good bet for you to accept?

No. This is a situation where you lose even if you win. Assuming the other person is being wise, they would take your \$2 and say, "I lose", and give you \$1 in return. You win the bet, but you're out \$1.

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Riddle:

What has one foot on each side and one in the middle?

A yardstick.

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Riddle:

A clock chimes 5 times in 4 seconds. How many times will it chime in 10 seconds?

11 times. It chimes at zero and then once every second for 10 seconds.

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Riddle:

The rungs of a 10 foot ladder attached to a ship are 1 foot apart. If the water is rising at the rate of one foot an hour, how long will it take until the water covers over the ladder?

It will never cover the ladder because as the water rises, so will the floating ship.

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Riddle:

The distance from the Earth to the Sun is about 100 million miles. The speed of light is 186,000 miles per second, and light takes eight minutes to reach the Earth from the Sun.  Let's say the Sun rose at 6am this morning, and that by some freak of physics the speed of light is suddenly doubled to 372,000 miles a second.

What time will the Sun rise tomorrow?

6am again. After all, what diffrence does the speed of light make to the answer?  It's irrelevant- only the speed of the roation of the Earth matters here.

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Riddle:

One word in this sentence is misspelled. What word is it?

MISSPELLED. It isn't spelled wrong, the one word in this sentence IS "misspelled."

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Riddle:

Two mothers and two daughters go shopping. They have \$21, which they split equally between them. How can this be possible?

There are only three people. One of the mothers is a daughter also, because there is a grandmother, a mother and a daughter! They each get \$7 exactly.

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Riddle:

How many times can you subtract the number 5 from 25?