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Nemanja Katanic

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last 3 solved tasks
NUMBERMANIA: Calculate the number 2632 using numbers [7, 5, 1, 1, 29, 326] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Can you count the number of squares in the picture?
MATH PUZZLE: Can you replace the question mark with a number?

Xerography

In 1938, xerography was demonstrated by Chester F. Carlson. With his assistant, Otto Kornei, Carlson used a sulphur coating on a zinc plate, vigorously rubbed with a handkerchief to apply an electrostatic charge. A glass slide was prepared using India ink to write "10-22-38 ASTORIA," then laid on the sulphur surface in a darkened room. After illuminating them with a bright incandescent lamp for a few seconds, the slide was removed. When lycopodium powder was sprinkled on the sulphur surface and blown off, there remained a near-perfect image of the writing. Permanent copies were made by transferring the powder images to wax paper and heating the sheets to melt the wax. Xerox is a term coming from "xerography" which means dry writing and is a trademark.

I'm actually a very nice person

I'm actually a very nice person… Until you piss me off.
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