BRAIN TEASERS

Monthly Archive - December 2020 (page 4)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 31 to 40.

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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: 22

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

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Top 10 Users (1174)

1.	H Tav	5861
2.	c. raj.	5777
3.	Nasrin 24 T	5731
4.	Fazil Hashim	5718
5.	Thinh Ddh	5557
6.	Alfa Omega	4681
7.	Djordje Timotijevic	4549
8.	Mita Kojd	4525
9.	Jakubovski Vladimir	4443
10.	Chandu Rajyaguru	4419

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Sir William Congreve

Died 16 May 1828 at age 55 (born 20 May 1772). English artillery officer and inventor (2nd Baronet) who invented a rocket (about 1804) for use in warfare that improved on simple black-powder rockets. They were first used militarily against the French on 8 Oct 1806 at Boulogne and later at Copenhagen and Leipzig. By 1830, most European armies had copied them. He also invented a gun-recoil mounting, a steam engine, a triple-paper process for coloured watermarks and a “perpetual-motion” machine. He created a wheelchair for himself after losing the use of his legs. He designed a vessel propelled by a “wave-wheel” and a human-powered aircraft. His 18 patents also include making of gunpowder, gas lighting, “hydropneumatic” canal locks, a rolling-ball clock and a built-in sprinkler system.«

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