Riddle:

Take two numbers, such that the square of the first, plus the square of the second, shall equal 8; while the first, plus the product of the first and second, shall equal 6.  What are the two numbers?

2 and 2.

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Riddle:

Find the four digit number in which the first digit is one fourth of the last digit, the second digit is 6 times the first digit, and the third digit is the second digit plus 3. What is it?

1694.

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Riddle:

What do you call two math friends?

Algebros!!

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Riddle:

What did one math book say to another?

I have so many problems.

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Riddle:

What is the most useful instrument in a mathematics teacher's tool kit?

Multi-pilers!

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Riddle:

Something very extraordinary happened on the 6th of May, 1978 at 12:34 a.m. What was it?

At that moment, the time and day could be written as: 12:34, 5/6/78.

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Riddle:

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Nine Years.

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Riddle:

A new medical building containing 100 offices had just been completed. Mark was hired to paint the numbers 1 to 100 on the doors. How many times will Mark have to paint the number nine?

The answer is 20! 9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99.

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Riddle:

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

The difference in age is 23 years, so I must be 23 if my father is twice as old as me.

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Riddle:

Take eight small sticks, four of which are half the length of the other four. Make three equal squares out of the sticks. 