ereboreanbadger:

Ravenclaw: Do it once you’ve gathered enough relevant information.
Hufflepuff: Do it with integrity.
Slytherin: Do it on your own terms.

Gryffindor: Do it for the vine.

(via cassjaytuck)

45,913 notes
How the Egyptians Did Math

sixpenceee:

So if you list out the double of numbers starting from 1 (1+1=2, 2+2=4) you can sum up every single number out there

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1+16= 17

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What if we wanted to do, something complicated like 17x25?

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Double the 2nd number. So 25+25=50, 50+50=100, and so on

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Circle the…

8,463 notes