Math Riddles With Answers

Practice flexible thinking with math riddles that reward careful reading as much as calculation. Great for classroom warm-ups, family game night and adult puzzle breaks.

46 riddles with answers Surprise me

Make them useful

Best ways to use math riddles

Maths lesson starters

Use a short puzzle to focus attention and show that mathematical thinking includes language and logic.

Early finishers

Let pupils solve independently, then require a written or spoken explanation of the reasoning.

Mixed-age challenges

Careful readers can often contribute even when another player is quicker at arithmetic.

Age guidance

Easy number riddles suit ages 7 and up. Multi-step logic and wording tricks are better for ages 10+, teens and adults. Check that younger players know any operations mentioned.

Read, guess, reveal

Math riddles

How many months have 28 days?

Type:Math
Reveal answer

The answer is

All 12 months

Hints and details

There are three apples. You take away two. How many apples do you have?

Type:Math
Reveal answer

The answer is

Two apples

Hints and details

Which number becomes bigger when you turn it upside down?

Type:Math
Reveal answer

The answer is

Six

Hints and details

Two fathers and two sons share three cookies so everyone gets one. How is that possible?

Type:Math
Reveal answer

The answer is

They are a grandfather, a father and a son

Hints and details

How can you add five to nine and get two?

Type:Math
Reveal answer

The answer is

On a clock: 9 o’clock plus 5 hours is 2 o’clock

Hints and details

Which digit can look the same in a mirror when written in a simple symmetrical style?

Type:Math
Reveal answer

The answer is

8.

Hints and details

What number looks like it is sleeping when you turn it on its side?

Type:Math
Reveal answer

The answer is

Eight

Hints and details

Why did the math teacher cut their sandwich in half?

Type:MathSchool
Reveal answer

The answer is

To make it a fraction.

Hints and details

You have 6 blue socks and 6 red socks in a dark drawer. What is the fewest socks you must pull out to guarantee a matching pair?

Type:Math
Reveal answer

The answer is

Three

Hints and details

What is the next number: 2, 3, 5, 9, 17, ?

Type:Math
Reveal answer

The answer is

33

Hints and details

I may look awkward as 48 over 64, but the more you break me down by common factors, the clearer I become. What am I?

Type:Math
Reveal answer

The answer is

A fraction

Hints and details

A sunflower head, a pine cone spiral and the numbers 1, 1, 2, 3, 5 all point to me. What am I?

Reveal answer

The answer is

The Fibonacci sequence

Hints and details

Move me one place in an invoice and ten pounds becomes a hundred; I look tiny, but I can empty a budget. What am I?

Type:Math
Reveal answer

The answer is

A misplaced decimal point

Hints and details

You can count along me, divide me, make me negative, and still never reach my final member. What am I?

Type:Math
Reveal answer

The answer is

The number line

Hints and details

What comes next: 2, 5, 10, 17, 26, ?

Type:Math
Reveal answer

The answer is

37

Hints and details

What comes next: 1, 4, 9, 16, 25, ?

Type:Math
Reveal answer

The answer is

36

Hints and details

What comes next: 1, 8, 27, 64, ?

Type:Math
Reveal answer

The answer is

125

Hints and details

What comes next: 1, 3, 7, 15, 31, ?

Type:Math
Reveal answer

The answer is

63

Hints and details

What comes next: 2, 6, 18, 54, ?

Type:Math
Reveal answer

The answer is

162

Hints and details

What comes next: 2, 3, 5, 8, 13, ?

Type:Math
Reveal answer

The answer is

21

Hints and details

What comes next: 1, 2, 4, 7, 11, ?

Type:Math
Reveal answer

The answer is

16

Hints and details

What comes next: 160, 80, 40, 20, ?

Type:Math
Reveal answer

The answer is

10

Hints and details

What comes next: 3, 5, 9, 17, 33, ?

Type:Math
Reveal answer

The answer is

65

Hints and details

What comes next: 4, 10, 18, 28, 40, ?

Type:Math
Reveal answer

The answer is

54

Hints and details

What comes next: 2, 3, 5, 7, 11, ?

Type:Math
Reveal answer

The answer is

13

Hints and details

What comes next: 1, 3, 6, 10, 15, ?

Type:Math
Reveal answer

The answer is

21

Hints and details

What comes next: 100, 91, 83, 76, 70, ?

Type:Math
Reveal answer

The answer is

65

Hints and details

What comes next: 1A, 2B, 4D, 8H, ?

Type:Math
Reveal answer

The answer is

16P

Hints and details

What comes next: 12, 21, 13, 31, 14, ?

Type:Math
Reveal answer

The answer is

41

Hints and details

One brick weighs 1 kg plus half a brick. How much does one brick weigh?

Type:Math
Reveal answer

The answer is

2 kg

Hints and details

A parent is 36 and a child is 9. In how many years will the parent be three times the child's age?

Type:Math
Reveal answer

The answer is

4.5 years

Hints and details

Two numbers add to 20. One number is 6 more than the other. What are the numbers?

Type:Math
Reveal answer

The answer is

7 and 13

Hints and details

You have 8 coins made of 10p and 20p coins. The total is £1.20. How many 20p coins are there?

Type:Math
Reveal answer

The answer is

4

Hints and details

I am a number. Double me and add 6 to get 30. What number am I?

Type:Math
Reveal answer

The answer is

12

Hints and details

Fill the missing number: 4, 8, 12, 16, ?

Type:Math
Reveal answer

The answer is

20

Hints and details

Fill the missing number: 3, 6, 12, 24, ?

Type:Math
Reveal answer

The answer is

48

Hints and details

Fill the missing number: 5, 10, 15, 20, ?

Type:Math
Reveal answer

The answer is

25

Hints and details

Fill the missing number: 1, 4, 7, 10, ?

Type:Math
Reveal answer

The answer is

13

Hints and details

Fill the missing number: 2, 4, 8, 16, ?

Type:Math
Reveal answer

The answer is

32

Hints and details

Fill the missing number: 10, 9, 8, 7, ?

Type:Math
Reveal answer

The answer is

6

Hints and details

Fill the missing number: 2, 5, 8, 11, ?

Type:Math
Reveal answer

The answer is

14

Hints and details

Fill the missing number: 100, 90, 80, 70, ?

Type:Math
Reveal answer

The answer is

60

Hints and details

Fill the missing number: 7, 14, 21, 28, ?

Type:Math
Reveal answer

The answer is

35

Hints and details

Fill the missing number: 1, 3, 5, 7, ?

Type:Math
Reveal answer

The answer is

9

Hints and details

There are 4 tables with 2 chairs each. How many chairs are there?

Type:Math
Reveal answer

The answer is

8

Hints and details

I am greater than 10, less than 20, even, and my digits add to 7. What number am I?

Type:Math
Reveal answer

The answer is

16

Hints and details

A simple group format

How to play

  1. 1Read the full riddle twice and let players note the important numbers or conditions.
  2. 2Award a point only when the solver can explain the steps, not for an unsupported guess.
  3. 3Compare two different solution methods after the answer is revealed.

Helpful answers

Math riddle FAQ

No. They combine numbers with logic, patterns and careful reading, so the route to the answer matters as much as arithmetic speed.

Children around age 7 can try the easiest clues. Match each riddle to the operations and vocabulary the solver already understands.

Either works. Mental solving keeps quick rounds lively, while paper is useful for multi-step riddles and for comparing methods.

Turn these riddles into a game

Earn points, build a streak and see how many clues you can solve without using a hint.

Play now