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Math Riddles With Answers
Number, calculation and mathematical-pattern riddles. Try each clue before revealing the answer and explanation.
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Math riddles
How many months have 28 days?
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The answer is
All 12 months
There are three apples. You take away two. How many apples do you have?
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The answer is
Two apples
Which number becomes bigger when you turn it upside down?
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The answer is
Six
Two fathers and two sons share three cookies so everyone gets one. How is that possible?
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The answer is
They are a grandfather, a father and a son
How can you add five to nine and get two?
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The answer is
On a clock: 9 o’clock plus 5 hours is 2 o’clock
Which digit can look the same in a mirror when written in a simple symmetrical style?
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The answer is
8.
What number looks like it is sleeping when you turn it on its side?
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The answer is
Eight
Why did the math teacher cut their sandwich in half?
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The answer is
To make it a fraction.
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?
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The answer is
Three
What is the next number: 2, 3, 5, 9, 17, ?
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The answer is
33
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?
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The answer is
A fraction
A sunflower head, a pine cone spiral and the numbers 1, 1, 2, 3, 5 all point to me. What am I?
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The answer is
The Fibonacci sequence
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?
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The answer is
A misplaced decimal point
You can count along me, divide me, make me negative, and still never reach my final member. What am I?
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The answer is
The number line
What comes next: 2, 5, 10, 17, 26, ?
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The answer is
37
What comes next: 1, 4, 9, 16, 25, ?
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The answer is
36
What comes next: 1, 3, 7, 15, 31, ?
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The answer is
63
What comes next: 160, 80, 40, 20, ?
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The answer is
10
What comes next: 3, 5, 9, 17, 33, ?
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The answer is
65
What comes next: 4, 10, 18, 28, 40, ?
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The answer is
54
What comes next: 1, 3, 6, 10, 15, ?
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The answer is
21
What comes next: 100, 91, 83, 76, 70, ?
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The answer is
65
What comes next: 1A, 2B, 4D, 8H, ?
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The answer is
16P
What comes next: 12, 21, 13, 31, 14, ?
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The answer is
41
One brick weighs 1 kg plus half a brick. How much does one brick weigh?
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The answer is
2 kg
A parent is 36 and a child is 9. In how many years will the parent be three times the child's age?
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The answer is
4.5 years
Two numbers add to 20. One number is 6 more than the other. What are the numbers?
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The answer is
7 and 13
You have 8 coins made of 10p and 20p coins. The total is £1.20. How many 20p coins are there?
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The answer is
4
I am a number. Double me and add 6 to get 30. What number am I?
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The answer is
12
Fill the missing number: 4, 8, 12, 16, ?
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The answer is
20
Fill the missing number: 3, 6, 12, 24, ?
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The answer is
48
Fill the missing number: 5, 10, 15, 20, ?
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The answer is
25
Fill the missing number: 1, 4, 7, 10, ?
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The answer is
13
Fill the missing number: 2, 4, 8, 16, ?
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The answer is
32
Fill the missing number: 10, 9, 8, 7, ?
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The answer is
6
Fill the missing number: 2, 5, 8, 11, ?
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The answer is
14
Fill the missing number: 100, 90, 80, 70, ?
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The answer is
60
Fill the missing number: 7, 14, 21, 28, ?
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The answer is
35
Fill the missing number: 1, 3, 5, 7, ?
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The answer is
9
There are 4 tables with 2 chairs each. How many chairs are there?
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The answer is
8
I am greater than 10, less than 20, even, and my digits add to 7. What number am I?
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The answer is
16
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