BRAIN TEASERS
The Most Difficult Tasks (page 166)

The Most Difficult Tasks (page 166)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1651 to 1660.
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Find number abc

If cb2b4 + aab74 = 13a27a find number abc. Multiple solutions may exist.
Correct answers: 9
CHECK ANSWER
#brainteasers #math
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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: 9
CHECK ANSWER
#brainteasers #mastermind
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What a winning 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: 9
CHECK ANSWER
#brainteasers #mastermind

I never said that

I never said that i would die if i didn't have coffee. I said other people would die.
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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: 9
CHECK ANSWER
#brainteasers #mastermind
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Find number abc

If 8b6c9 - c5348 = 533a find number abc. Multiple solutions may exist.
Correct answers: 9
CHECK ANSWER
#brainteasers #math
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Find number abc

If ba53b + c573a = 7c2cb find number abc. Multiple solutions may exist.
Correct answers: 9
CHECK ANSWER
#brainteasers #math
[link]

What a winning 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: 9
CHECK ANSWER
#brainteasers #mastermind
[link]

Find number abc

If 9b80a - 90ac7 = bbbb find number abc. Multiple solutions may exist.
Correct answers: 9
CHECK ANSWER
#brainteasers #math
[link]

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: 9
CHECK ANSWER
#brainteasers #mastermind
[link]

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: 9
CHECK ANSWER
#brainteasers #mastermind
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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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Rufus Henry Gilbert

Died 10 Jul 1885 at age 53 (born 26 Jan 1832).U.S. surgeon and inventor who played a major role in the development of rapid transit in New York City. After serving as a surgeon in the Federal Army in the Civil War, he became interested in rapid transit as a means of freeing people from living in the unhealthful, crowded tenements in the centres of large cities. Gilbert obtained two patents in 1870 on a pneumatic-tube system, and he incorporated the Gilbert Electric Railway Company on 17 Jun 1872, to build elevated lines in New York City. The cars were to be propelled by air pressure from pneumatic tubes mounted on the elevated structure. A financial depression delayed construction until 1876, and forced adoption of a conventional track with trains drawn by steam locomotives, which opened 6 Jun 1878.
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