Darcourse

Jokes!!!

Two Chinese brothers, Wong A. and Wong B., decide to set up a paint factory 'TuWongs'. They only sell the darker shades. Why?

Because TuWongs don't make a white!

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A bloke breaks into a yoghurt factory, but he got caught.

Now he feels like a fool!.

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How do you make a sausage roll?

Push it down a hill!

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Did you you hear about the postman who lost his job?

He got the sack!

Lexical

What are called 00101101 and 3,5,6,8?

Coupon collection

An album has 100 places. A sticker pack of 5 costs $1. Individual named stickers cost $10 each. When it is wise to buy individual stickers instead of packs?

Pythagoras puzzle

If $a^{2}+b^{2}=c^{2}$ and $d^{2}+e^{2}=f^{2}$, can $a^{2}+d^{2},b^{2}+e^{2},c^{2}+f^{2}$ all be squares?

Triangles

Pasch's axiom

Let T be a triangle, and X,Y,Z be points on each edge, not at a vertex. The lines XY, YZ, XZ meet the triangle's extended edges at P, Q, R.

How is $\triangle XYZ$ related to $\triangle PQR$?

Congruent number

The congruent number problem asks which square numbers are in an arithmetic progression of 3.

Are there higher powers such that 3 lie in an AP?

Numerology

Take your star sign and your birth-date. Add each digit modularly to the star sign. Your final star sign is your friend.

Port numbers

Any idea which port we should use?

List of TCP and UDP port_numbers

70? Yeah, let's go for it!