Looking for math riddles? You've found the right page. We've collected 20 kid-safe math riddles, ranging from quick "what am I" warm-ups to head-scratching brain-teasers. Each riddle includes the answer behind a tap, so kids get a chance to guess before peeking. Great as classroom starters, lunch-box surprises, or a family game.
63 math riddles
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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…
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?
What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1,000?
Hint: What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/1…
What’s the least number of chairs you would you need around a table to sit four fathers, two grandfathers, and four sons?
Hint: What’s the least number of chairs you would you need around a table to sit four …
What year comes next in this sequence: 1973 1979 1987 1993 1997 1999
When can you add two to eleven and get one as the correct answer?
Which clock works best, the one that loses a minute a day, or the one that doesn’t work at all?
Hint: Which clock works best…
Which is heavier ? A pound of feathers or a pound of gold.
Which triangle has a bigger area: 1. A triangle with sides measuring 300, 400, and 500. 2. A triangle with sides measuring 300, 400, and 700.
Hint: Which triangle has a bigger area: 1…
While on my way to St. Ives, I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kitten, cats, sacks, wives, How many were going to St. Ives?
Hint: While on my way to St…
Why are 1990 dollar bills worth more than 1989 dollar bills?