# MATH RIDDLES

### Fun Facts (Hints)

Different types of riddles have challenged people for centuries, here are a few facts about them that may give you some hints in solving these challenging questions:
• Riddles in math are used by math teachers in many different cultures.
• Many teachers promote the idea that giving students mathematical riddles helps to encourage their pupils to think more creatively and strategically.
• These riddles are considered especially helpful in classrooms where students have emotional problems, as it pulls them away from their problems, and forces them to think creatively about what is before them.
• Detectives are sometimes forced to solve riddles involving math when searching for psychopaths and serial killers.
• Math riddles are used at home by many parents seeking to help their students become more engaged in their math schoolwork/homework.

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Hint:
When it is full of problems!
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Solved: 64%

## 10 From 100 Riddle

Hint:
Once. Next time you would be subtracting 10 from 90.
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Solved: 64%

## Little Billy's Calculator

Hint: Think about how many ways he could possibly get 6.
There is a 4% chance.

There are 16 possible ways to get 6.

0+6
1+5
2+4
3+3
6+0
5+1
4+2
9-3
8-2
7-1
6-0
1x6
2x3
6x1
3x2
6/1

There are 400 possible button combinations.

When Billy presses any number key, there are 10 possibilities; when he presses any operation key, there are 4 possibilities.

10(1st#)x4(Operation)x10(2nd#)=400

16 working combinations/400 possible combinations= .04 or 4%
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## The Gardners Riddle

Hint:
Gretchen said that there were 4 girls in the family, three of whom were blond.

This would make the probability that she saw two blonds (3/4) * (2/3), which equals 1/2.

Other numbers would work, but the next pair would lead to a rather large family.
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Solved: 84%

## 1 + 1 = 3 Riddle

Hint:
When you're pregnant!
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Solved: 53%

## 30 Sacks Of Coconuts

Hint:
He will have 25 coconuts with him at the end. The trick is to reduce the number of sacks as you pass checkpoints.

The first 10 checkpoints require 3 coconuts each, which empties his first sack. The next 15 checkpoints require 2 coconuts each, which will empty his second stack. Now, he is left with 1 sack and 5 more checkpoints. So, the 5 checkpoints will take 1 coconut each. Therefore, he will be left with 25 coconuts.
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Solved: 44%

## 100 Fruits

Hint:
80 Cherries, 01 Orange and 19 Watermelons.
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Solved: 67%

## 5+5+5=550 Riddle

Hint:
Add a line to make the first + a 4 545+5=550
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Solved: 43%

## Equals Eight Riddle

Hint:
Mirror one of the threes and put it and the other three together to get an eight.
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Solved: 61%

## More Than 90 Degrees Riddle

Hint:
An obtuse angel
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Solved: 55%

## Post Your Math Riddles Below

Can you come up with a cool, funny or clever Math Riddles of your own? Post it below (without the answer) to see if you can stump our users.