# MATH BRAIN TEASERS

### Fun Facts (Hints)

Mathematics has an extensive history in just about every culture or civilized society known to man. Listed below are some cool facts to get those math juices flowing:
• In 1852 mathematician JJ Sylvester established the "theory of algebraic invariants."
• In 1995 math great Andrew Wiles, proved "Fermat's Last Theorem."
• The first decimal number system is said to have been invented in Ancient Egypt around 5000BC.
• The Ancient Mayan civilization located in Central America is one of the only cultures in the recorded history of the world to use a place-value number system.
• The American Mathematical Society was formed in the late months of 1888 in New York.

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Terms · Privacy · Contact Math brain teasers are awesome math questions and problems given to entertain us while at the same time giving us an education. Cognitive skills are vital to performing well in almost every activity that we participate in daily, especially in the math field.

This collection compiled by our staff on a regular basis will provide you with a great way to workout that math brain power, and will hopefully benefit you in your studies.

This is an awesome collection for anyone ages 5 and up, and contains a comprehensive set of riddles related to math for a wide range of audiences.

How many of these convoluted math riddles do you think that you can solve? Try out our collection, and be sure to come back regularly to solve our newly added math brain teasers.

## A Grandmother Two Mothers And Two Daughters Riddle

Hint:
They ordered three cups, one for each person. The grandmother is also a mother and the mother is also a daughter.

Another solution: They ordered two cups. Both are mothers and daughters and one is a grandmother.
Did you answer this riddle correctly?
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Solved: 79%

## How Many Times Can You Subtract 5 From 25 Riddle

Hint:
Only one time. After that, you would be subtracting from 20.
Did you answer this riddle correctly?
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Solved: 60%

## Mary Has 4 Daughters Riddle

Hint:
Mary has four daughters. Let x be the daughter.
Four daughters mean - x + x + x + x
Each of her daughters has one brother - let y be the son.
Total children => x + x + x + x + y. => 5
She has Total 5 children, all of her daughters have the same 1 brother.
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Solved: 80%

## If You Take 3 Apples From 10 Apples Riddle

Hint:
Three.

If you take 3 apples from 10 apples, you are simply left with 3 apples.

Many people confuse themselves with the mathematical equation, subtracting three apples away from 10 and therefore equaling an answer of seven apples. This is incorrect.

You did not have any apples to begin with. So by taking 3 apples from 10 apples, you therefore now have 3 apples.
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Solved: 73%

## 10 Apples In A Basket Riddle

Hint:
One of the people took the basket.
Did you answer this riddle correctly?
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Solved: 46%

## A Man Buys A Goat For \$60 Riddle

Hint:
He made \$20. \$10 the first time, \$70 - \$60 = \$10, and \$10 the second time, \$90 - \$80 = \$10, for a total of \$20.
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Solved: 72%

## A Man Steals 1000 From A Shop Riddle

Hint:
We can easily solve this mathematical problem by using the following mathematical process.

Initial loss amount = Rs. 1000

Now, we have to calculate the recovered amount,

As the man spends Rs. 700 in the shop, the shop owner will surely provide the man goods/services of Rs. 700. So, nothing will be recovered in this case.

Now, the man gave Rs. 1000 against the goods/services of Rs. 700 and got Rs. 300 change, so there will be no recovering of money for the shopkeeper.

Final loss = Initial loss - Recovered amount = 1000-0 = Rs. 1000
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Solved: 66%

## 7 Men Have 7 Wives Riddle

Hint:
If 7 men have 7 wives that simply means there are 7 coupled, so that is 7 +7 = 14.
Then, if each couple has a child, that's 14 + 7 = 21.
So the total number of people is 21.
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Solved: 46%

## If Eleven Plus Two Equals One Riddle

Hint:
11 o'clock plus 2 hours = 1 o'clock

9 o'clock plus 5 hours = 2 o'clock
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Solved: 59%

## What Remains When The Roads Are Gone Riddle

Hint:
Let's take a look at the explanation of the riddle.

As per the total laps in the race are 50 and the driver has completed 12 1/2 laps. This means, we have to subtract 12 1/2 from the total 50 laps. This equal to 37 1/2 or 37.5

50 - 12 1/2 = 37 1/2 or 37.5

Now, we need to calculate the fractional part of the race remains. For this, we need to divide the remaining laps by total laps, that is, 37 1/2 divide by 50 or 37.5 divided by 50 which will be equal to 0.74 or 3/4.

37 1/2 / 50 = 0.74 or 3/4

Hence, the right answer to the riddle is 3/4
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Solved: 70%

## McDonalds Riddle

Hint: The key is to first determine how much each item is worth. The drink is clearly worth 10, and it's apparent from the second line that the burgers are worth five.
Pictures of the fries are each worth two, but you have to keep in mind that each individual packet of fries is worth one when you get to the next line. That has baited people into thinking, incorrectly, that the last line is 5 + 2 x 10.

The fourth line has also thrown many people off because it involves order of operations after already including the tricky single packet of fries.

Multiplication comes before addition, so you have to multiply one packet of fries by one drink and then add that to one burger. Thus, 5 + (1x10) = 15.
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## Clock Calculator Bulb Riddle

Hint:
Find the value of one clock using the first equation. According to first equation, 9’o clock + 9’o clock + 3'o clock = 9 + 9 + 3 = 21.

Therefore; 1 Clock = 1

Using equation two, three calculators are equal to 30. Therefore, one calculator is equal to 10.

Also, the sum of numbers inside the calculator is 1 + 2 + 3 + 4 = 10.

Therefore, the value of the calculator depends on the sum of the numbers inside it.

According to equation three, 1 Bulb + 1 Bulb - 1 Bulb = 15.

Cancelling out the + and -; we get 1 Bulb with five lights = 15
.
Therefore, one bulb with one light = 3.

Bulb with four lights = 4 x 3 = 12.

The final equation is - 9’o clock + Calculator (1+2+2+4) x 3 bulbs (with four light rays each)

Translating the final equation into numbers - 9 + (1+2+2+4) x 3(12)

9 + 9 x 36 = 9 + 324 = 333.

Answer to 'Watch Calculator bulb' puzzle is 333.
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Solved: 46%

## Circle With 5 In The Middle Riddle

Hint:
25
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Solved: 65%

## Chicken Egg Banana Riddle

Hint:
1 Chicken = 20 - So, 20 + 20 + 20 = 60
1 Egg Basket = 3 - So, 20 + 3 + 3 = 26
1 Bunch of Bananas = 6 - So, 3 + 6 + 6 = 15
Finally, Chicken = 20 ; Egg Basket = 3 ; Bananas = 6 - So, 20 + 3 x 5 = 35

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Solved: 63%

## Witch Broom Wand Riddle

Hint:
Answer: 73 ...Broom - 3 (2nd picture compose of 2 brooms) that gives you 3+3+3+3 = 12 ...Wand - 7 (3 wands equal 21) ...Witch - 5 (15 each while carrying broom and wand giving you 45, so remove them in the last picture ...So 3 + (5x14) = 73
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Solved: 51%

## Post Your Math Brain Teasers Below

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