Math Riddles with Answers You Can Count on for a Smile

Math is a favorite at our house. The kids love the math jokes I collected years ago, it’s time to add to the fun with these math riddles with answers.

Since we’re on the subject of school, check out our riddles for teachers, riddles about school, and science riddles.

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Math Riddles with Answers

• How do you go from 98 to 720 using just one letter? – Add an “x” between “ninety” and “eight”. Ninety x Eight = 720.
• An apple is 40 cents, a banana is 60 cents and a grapefruit is 80 cents. How much is a pear? – 40 cents. The price of each fruit is calculated by multiplying the number of vowels by 20 cents.
• How many 9’s are there between 1 and 100? – 20.
• Add me to myself and multiply by 4. Divide me by 8 and you will have me once more. What number am I? – Any number.
• In two years I know, I’ll be twice as old as five years ago, said Tom. How old is Tom? – 12.
• I am four times as old as my daughter. In 20 years time I shall be twice as old as her. How old are we now? – I am 40 and my daughter is 10.
• One is to three as three is to five and five is to four and four is the magic number. What is the pattern? – One has three letters in the word three has five letters in it five has four letters and four has four letters in it (if you try more numbers they will always come back to the number four: so four is the magic number).
• If a boy blows 18 bubbles, then pops 6, eats 7, then pops 5, and blows 1. How many are left? – 1.
• 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? – Number 194.
• You have 6 eggs. You break 2, cook 2, and eat 2. How many do you have left? – 4. The 2 you break are the ones you cook, which are the ones you eat.
• The head of a whale is six feet long; his tail is as long as his head and half his body, and his body is half of his whole length. How long is the whale? – 48 feet.
• A half is a third of it. What is it? – 1 1/2.

Add your favorite Math riddle to the comments.

For more giggly fun, check out these books:

• Best Joke Books for 7-year-olds
• Knock-Knock Jokes for Kids (check it out on Amazon here) – Affiliate link
• Laugh-out-Loud Jokes for Kids (check it out on Amazon here) – Affiliate link
• National Geographic Kids Just Joking (check it out on Amazon here) – Affiliate link