BRAIN TEASERS

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Find the right combination

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Correct answers: 26

The first user who solved this task is Nasrin 24 T.

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April Fools' Day Pranks - Picture This

Take a screenshot of the desktop of Dad's computer, and leave the image open. Sit back and let him freak out for a few minutes, believing the computer is frozen.

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Celluloid

In 1869, John Wesley Hyatt and Isaiah Hyatt were issued a U.S. patent for the first plastic, which they called "Improved Method of Making Solid Collodion" (No. 91,341). In their method, soluble cotton, pyroxyline, or prepared cellulose was placed into a strong cylinder or suitably-shaped mold. Then "the employment of a very small quantity of ether or other appropriate solvent, and dissolving pyroxyline therewith, under a heavy pressure, so that a comparatively hard and solid product is obtained, with great economy of solvents and saving of time." A filler may be mixed with the pyroxyline such as ivory-dust, bone-dust, asbestos, flake-white, or any other desirable substance, according to the nature of the product required.«

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