Math Riddles With Answers

Number, calculation and mathematical-pattern riddles. Try each clue before revealing the answer and explanation.

46 riddles with answers Surprise me

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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

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Which number becomes bigger when you turn it upside down?

Type:Math
Reveal answer

The answer is

Six

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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

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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

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

Type:Math
Reveal answer

The answer is

8.

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

Type:Math
Reveal answer

The answer is

Eight

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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

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

Type:Math
Reveal answer

The answer is

33

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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

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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

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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

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

Type:Math
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The answer is

37

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

Type:Math
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The answer is

36

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

Type:Math
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The answer is

125

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

Type:Math
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The answer is

63

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

Type:Math
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The answer is

162

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

Type:Math
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The answer is

21

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

Type:Math
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The answer is

16

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

Type:Math
Reveal answer

The answer is

10

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

Type:Math
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The answer is

65

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

Type:Math
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The answer is

54

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

Type:Math
Reveal answer

The answer is

13

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

Type:Math
Reveal answer

The answer is

21

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

Type:Math
Reveal answer

The answer is

65

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

Type:Math
Reveal answer

The answer is

16P

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

Type:Math
Reveal answer

The answer is

41

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

Type:Math
Reveal answer

The answer is

2 kg

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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

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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

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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

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

Type:Math
Reveal answer

The answer is

12

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

Type:Math
Reveal answer

The answer is

20

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

Type:Math
Reveal answer

The answer is

48

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

Type:Math
Reveal answer

The answer is

25

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

Type:Math
Reveal answer

The answer is

13

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

Type:Math
Reveal answer

The answer is

32

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

Type:Math
Reveal answer

The answer is

6

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

Type:Math
Reveal answer

The answer is

14

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

Type:Math
Reveal answer

The answer is

60

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

Type:Math
Reveal answer

The answer is

35

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

Type:Math
Reveal answer

The answer is

9

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

Type:Math
Reveal answer

The answer is

8

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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

Helpful answers

Math riddle FAQ

All 12 months

Two apples

Six

They are a grandfather, a father and a son

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

8.

Eight

To make it a fraction.

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