# 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.

#### Popular Searches

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## Guilders Expense Riddle

Hint:
Ten guilders. An artist cost 7 guilders, and a stonemason cost 3 guilders.
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Solved: 71%

## Shotgun Pete Riddle

Hint:
Pete owned 12 guns.
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Solved: 72%
Hint:
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Solved: 43%

## Add Up To 100 Riddle

Hint:
1+2+3+4+5+6+7+(8x9)=100
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Solved: 65%

## How Many Spaces Riddle

Hint:
64; the space that comes after the 64th spoke, would be the first spoke.
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Solved: 62%

## The Bus Stop Riddle

Hint:
Ne, the bus driver.

On the 1st stop, 5 people get on. On the 2nd stop, 5 people get off and 10 (twice as many as at 1st stop) people get on. On the 3rd stop, 10 people get off. So there are (5 5 + 10 10) 0 passengers left, which leaves the bus driver as the only person on board the bus.
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Solved: 93%

## Three Rivers Riddle

Hint:
This problem has an infinite number of solutions modeled by the equation 8a=7n, where a is the amount of flowers the man starts with and n is the number of flowers he leaves at each grave. The simplest and possibly trivial solution would be to start with 0 flowers and leave 0 flowers at each grave. A more significant solution would be to start with 7 flowers and leave 8 at each grave. Any positive integer multiple of this solution also satisfies the conditions. For example, the man starts with 14 flowers and leaves 16 at each grave; so, 14 doubles to 28, and 28-16= 12; 12 doubles to 24, and 24-16= 8; 8 doubles to 16, and 16-16= 0. The result is the same if the man starts with 21 flowers and leaves 24 flowers at each grave, or starts with 28 and leaves 32.
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Solved: 63%

## Farmer Stones Riddle

Hint:
The stones weight 1 pound, 3 pounds, 9 pounds and 27 pounds. These can be used in combination with each other on both sides of the scale to come up with any counterweight from 1 to 40 pounds.
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Solved: 50%

## A Farmers Sheep Riddle

Hint:
9
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Solved: 83%

## How Many Chocolates Can You Get?

Hint:
15 chocolates with resale. 15 then with 15 wrappers you get 5 more chocolates. With 3 wrappers from the 5 new chocolates you get 1 more chocolate. And with these 1 more wrapper and the remaining 2 wrappers you get 1 more chocolate. Hence you get total 15 + 5 + 1 + 1 = 22
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Solved: 67%

## Post Your Math Brain Teasers Below

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