MATH RIDDLES

What did one math book say to the other math book?

What did the little lobster get on its math test?

What do mathematics teachers like to eat?

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

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly. The Question: How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly?

If 4+2=26, 8+1=79 and 6+5=111. Then, what is 7+3?

When asked how old she was, Suzie replied, "In two years I will be twice as old as I was five years ago." How old is she?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Adored by few, Feared and hated by many. Mistress of the entire universal reason, Master in the art of numbers. Some may have solved many of your mysteries, But there still much of them to find. What are they?

Three matches are sitting on a table. Without adding another make for three matches four. You are not allowed to break any of the matches.