Pancake Math

panecake2“Archaeological evidence suggests that pancakes are probably the earliest and most widespread cereal food eaten in prehistoric societies.” – Wikipedia

 

What is the maximum number of sections into which a pancake may be divided into by four straight cuts through it?

Here more difficult questions go:

1) Is it possible to divided it so that all sections have equal area?

2) How many pancakes are needed to reach your height if they are squeezed by the weight of the upper pancakes?

3) If I spent 30 grams of batter for a pancake (French-style crêpe) of 30 cm in diameter how much batter do I need for the square pancake of the same thickness and the side length of 30 cm?  

 

These and many other practical “pancake” questions are presented in the Applied Math section of A+Click series, which already includes more than 4500 questions.

 

19th Century Math Genius Taught Us the Best Way to Hold a Pizza Slice

(Re-blogged from http://www.wired.com/2014/09/curvature-and-strength-empzeal/ )1030

Just fold the pizza slice into a U shape that keeps the slice from flopping over.

Very complex math theory explains extremely simple thing that we get from our experience ourselves. Do we really need math theory for that? I think – YES.

Math genius Carl Friedrich Gauss did not mean pizza when he created the theory. Probably, the pizza did not exist in 1800 in the same way we eat it now.

The are many phenomena that we used to see and can be or cannot be explained later by the theorists.

Please hold your pizza as Mr. Gauss advised.

The man who counted

The man who counted

“In 1932 Malba Tahan published what would became one of the most successful books ever written in Brazil – O Homem que Calculava – The Man Who Counted.”

Really Practical Math

Math can be really practical and useful!Image

For students.

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For lock breakers.

For car racers.

For pool managers.

For family folks.

 

No Math. No Problem!

John said:

No Math . . .  No Problem!

Real Word vs Math Word ???

SAT is a measure how much rich the guy’s parents are.

The Best Math Word Problems

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What are real-life math problems?

What are the funniest word problems?

What are the shortest word problems?

What are the most difficult word problems?

What are the best word problems?

Math and logic word problems. Here my preferred word problems go:

Practical:

How many tennis balls can fit in a school bus?

A goldfish need 1000 cubic inches of water to live in. 
An aquarium is 20 inches in diameter. 

How many fish can live in an aquarium?

Funny:

1 costs $10; 20 costs $20. How much does 100 cost?

99% of nuts and 99% of a nut cost as much as all nuts. How many nuts are there?

At least two Londoners have the same number of hair. Correct?

80% of IT projects fail, and 20% of managers are female. How many male managers succeed?

Short:

Does clock hands overlap 22 times in 24h?

How many zeros are at the end of 99!?

Make 33 by using three 3s and any signs.

Difficult:

Six Millennium Prize Problems set by the Clay Mathematics Institute have yet to be solved.

http://en.wikipedia.org/wiki/List_of_unsolved_problems_in_mathematics

The Best:

Short + Funny + Practical + Difficult = Best

My preferred math and logic word problems are at www.aplusclick.org

The latest collection of the best free A+Click Puzzles are at Apple App Store

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