Bullet Proof Glass

How is bullet proof glass made?

Bullet proof glass is a sandwich made up of transparent plastic between two layers of ordinary glass. The first sheet of glass shatters when ills hit, dissipating much of the bullet's energy. The remaining momentum is caught by the plastic layer, which distorts but leaves the other glass sheet intact. The material is further strengthened through a process of heating and cooling called tempering.

Simone de Beauvoir

A French public intellectual, political activist, feminist theorist, social theorist, and existentialist philosopher who wrote The Second Sex book:



Simone de Beauvoir (1908-1986)

Divisible by 12

A number is divisible by 12 if it is divisible by 3 AND 4.

Remember:

1) If the sum of the digits of a number is divisible by 3 that number is divisible by 3. For example, 2130021 is divisible by 3 because 9, the sum of its digits (2 + 1 + 3 + 0 + 0 + 2 + 1 = 9), is divisible by 3.

2) If half of a number is an even number then that number is divisible by 4. For example, 72 is divisible by 4 because half of it, 36, is an even number. Also, if the last two digits of a number is divisible by 4 then that number is divisible by 4. As an example: 897232 is divisible by 4 because its last 2 digits; i.e. 32, is divisible by 4.

Q: Is 804 divisible by 12?

A: Yes, because it is divisible by 3 and 4:

8 + 0 + 4 = 12 where 12 is divisible by 3
AND
804 / 2 = 402 where 402 is an even number.

Practice:

Find a path from the START to the END passing only through numbers that are divisible by 12. Note that there is only one solution for this numerical maze.

Scroll down to check your solution!

Recorded History

The period in history of the world that starts around the 4th millennium BC, with the invention of writing:


Recorded History

Recorded history is the period in history of the world after prehistory.

Existentialism

A philosophical theory or attitude having various interpretations, generally emphasising the existence of the individual as a unique agent with free will and responsibility for his or her own acts, though living in a universe devoid of any certain knowledge of right and wrong:


Existentialism

Existentialism Is a Humanism by Jean-Paul Sartre

Existentialism

Jean-Paul Sartre

A French novelist, existentialist philosopher, playwright, screenwriter, and literary critic, who was awarded the 1964 Nobel Prize in Literature but refused it:



Jean-Paul Sartre (1905 – 1980)

Jean-Paul Sartre

Manganese

Very hard and brittle metallic element used as an important component of steel:




Manganese

Manganese is a chemical element, designated by the symbol Mn. It has the atomic number 25. It is found as a free element in nature (often in combination with iron), and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels [Read more ...].

Manganese

Jalfrezi

Moderately-spicy Indian curry of marinated meat or vegetables cooked with peppers, tomatoes, onions, and chillies:







Jalfrezi

Jalfrezi