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The Most Difficult Tasks

The Most Difficult Tasks

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10.
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Find number abc

If 6a787 - 1bc78 = 4880c find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math
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What represents the followin...

What represents the following text 3AIAWM?
Correct answers: 3
The first user who solved this task is Sanja Šabović.
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#brainteasers #wordpuzzles #riddles
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Calculate 876+876-876

If 123+741-900=2196 and 900+144-876=6569 then 876+876-876=?
Correct answers: 3
The first user who solved this task is Sanja Šabović.
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#brainteasers #math #riddles

The Crowded Store

It was the day of the big sale. Rumors of the sale (and some advertising in the local paper) were the main reason for the long line that formed by 8:30, the store's opening time, in front of the store.
A small man pushed his way to the front of the line, only to be pushed back, amid loud and colorful curses. On the man's second attempt, he was punched square in the jaw, and knocked around a bit, and then thrown to the end of the line again. As he got up the second time, he said to the person at the end of the line...
"That does it! If they hit me one more time, I won't open the store!"
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What represents the following ...

What represents the following text 11OFT?
Correct answers: 3
The first user who solved this task is Sanja Šabović.
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#brainteasers #riddles
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Decrypt hidden message

Can you decrypt hidden message (1C42 92S1 T5B38 OV1 IS B3LT5B38S 1C4ROVGC4)?
Correct answers: 3
The first user who solved this task is Sanja Šabović.
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#brainteasers #wordpuzzles #riddles
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Calculate 100/17

IF 23=33, 54=31, 77=42 THEN 100/17=? Express result to the accuracy of 3 decimal.
Correct answers: 3
The first user who solved this task is Sanja Šabović.
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#brainteasers #math #riddles
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What represents the following ...

What represents the following text 10DD?
Correct answers: 3
The first user who solved this task is Erkain Mahajanian.
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#brainteasers #riddles
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Remove 4 letters from this seq...

Remove 4 letters from this sequence (SPEYSTTEIM.) to reveal a familiar English word.
Correct answers: 4
The first user who solved this task is Sanja Šabović.
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#brainteasers #wordpuzzles
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Look carefully the picture a...

Look carefully the picture and guess the game name.
Correct answers: 4
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #games
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Can you decrypt hidden text?

Look carefully image and try to decrypt hidden text.
Correct answers: 4
The first user who solved this task is Sanja Šabović.
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#brainteasers #wordpuzzles
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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.
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Friedlieb Ferdinand Runge

Died 25 Mar 1867 at age 72 (born 8 Feb 1795). German chemist considered to be the originator of the widely used analytic technique of paper chromatography. In the course of his research on synthetic dyes, he isolated and named several important components of coal-tar oil, among them carbolic acid (1934, now called phenol), pyrrole, rosolic acid (aurin), and cyanol (aniline). He did not analyze any of these compounds, however. In 1850, Runge published the first systematic study of chromatography: concentric circles of different coloured substances diffused through paper. He also noted the ability of belladonna to induce long-lasting dilation of the pupil of the eye (mydriasis), and he developed a process for obtaining sugar from beet juice. He investigated dry distillation and the composition of matter.
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