Math Riddles for Kids

In the NBA, how many men are on the basketball court for each team?

• You have four digits: 2, 3, 4, and 5.
• Use each one exactly once.
• You may only use plus and equals.
• Make both sides balance perfectly.
• Can you find the simple solution?

Hint: Pair the smallest with the largest number.

Mary was working in a chemistry lab with a mixture of chemicals that was 90% water and weighed 20 pounds. After returning to the lab from a weekend break, she calculated the mixture was now 50% water. How much does the mixture now weigh? For purposes of this puzzle, assume the non-water part of the mixture was not affected by evaporation.

Hint: Mary was working in a chemistry lab with a mixture of chemicals that was 90% wat…

Mr. and Mrs. Wilson have five children, half of them are boys.How is this possible?

Hint: Mr…

RIDDLE:When asked how old she was, Suzie replied, “In 2 years I will be twice as old as I was 5 years ago.”How old is she?

Hint: RIDDLE:When asked how old she was…

Top and bottom are pals. Their sum sits in the heart of the pie. Add them up to find the missing piece.

Hint: Just add the two numbers that face each other.

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

Hint: Something very extraordinary happened on the 6th of May…

The marathon man timed himself and found out that if he wore a bright white outfit he ran 20 miles in 80 minutes, but when he wore a dark outfit, he ran 20 miles in one hour and twenty minutes. What does this mean for his next race?

Hint: The marathon man timed himself and found out that if he wore a bright white outf…

The two dice in each pair are identical. As usual, the numbers on opposite sides add up to seven. On each pair, what is the total of the two hidden sides that face each other? CLUE:Dice A has a 5 and 3

Hint: The two dice in each pair are identical…

There is a certain family with both girl and boy children. Each of the boys has the same number of brothers as he has sisters. Each of the girls has twice as many brothers as she has sisters. How many boys and girls are there in this family?

Hint: There is a certain family with both girl and boy children…

Three people check into a hotel. They pay $30 to the manager and go to their room. The manager suddenly remembers that the room rate is $25 and gives $5 to the bellboy to return to the people. On the way to the room the bellboy reasons that $5 would be difficult to share among three people so he pockets $2 and gives $1 to each person. Now each person paid $10 and got back $1. So they paid $9 each, totalling $27. The bellboy has $2, totalling $29. Where is the missing $1?

Hint: Three people check into a hotel…

Trains travel from one town to another town all day, always on the same track, always going nonstop and at the same speed. The noon train took 80 minutes to complete the trip, but the 4 PM train took an hour and 20 minutes. Why?

Hint: Trains travel from one town to another town all day…

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

Hint: Two mothers and two daughters go shopping…

Walking home one day, you take a short cut along the train tracks. The tracks cross a narrow bridge over a deep gorge. At the point you are 3/8 of the way across the bridge, you hear the train whistle somewhere behind you. You charge across the bridge, and jump off the track as the train is about to run you down. As it happens, if you had gone the other way, you would have reached safety just before being run over as well. If you can run ten miles per hour, how fast is the train moving?

Hint: Walking home one day…

Round and baked, with a crust so flaky, Fill with fruit or custard, don’t be shaky. Slice me in wedges, equal parts, A treat for math class, straight from the heart.

Hint: 3.14…

• I have four straight sides.
• My opposite sides are equal.
• I am like a stretched square.
• You see me in books, screens, and buildings.
• What shape am I?

Hint: It’s not a square; two sides are longer.

what is a triangle with 2 sides?

What is significant about 3661 seconds past midnight on 1st January 2001?

What is the difference between a dollar and a half and thirty five-cents?

A curious pattern is growing fast. 24, then 120, then 720. Each is built from multiplying a special chain. Can you guess the fourth?

Hint: Think of factorials!