BRAIN TEASERS
The Most Difficult Tasks (page 126)

The Most Difficult Tasks (page 126)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1251 to 1260.
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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: 3
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: 3
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 891

NUMBERMANIA: Calculate the number 891 using numbers [2, 4, 5, 4, 29, 130] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
CHECK ANSWER
#brainteasers #math #numbermania

The Preacher's Teeth

A minister had all of his remaining teeth pulled out. New dentures were being made.

  • The first Sunday, he only preached 10 minutes.
  • The second Sunday, he preached only 20 minutes.
  • On the third Sunday, he preached 1 hour 25 minutes.

When asked about this by some of the congregation, he responded this way:

“The first Sunday, my gums were so sore it hurt to talk. The second Sunday, my new dentures were hurting me a lot. The third Sunday, I accidentally grabbed my wife's dentures... and I couldn't shut up.”

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Find number abc

If ac40c + a24a0 = 18b8ac find number abc. Multiple solutions may exist.
Correct answers: 3
CHECK ANSWER
#brainteasers #math
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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: 3
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: 3
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: 3
CHECK ANSWER
#brainteasers #mastermind
[link]

Calculate the number 779

NUMBERMANIA: Calculate the number 779 using numbers [1, 3, 5, 5, 64, 467] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 2237

NUMBERMANIA: Calculate the number 2237 using numbers [8, 6, 5, 7, 58, 314] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
CHECK ANSWER
#brainteasers #math #numbermania
[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: 3
CHECK ANSWER
#brainteasers #mastermind
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Roger Adams

Died 6 Jul 1971 at age 82 (born 2 Jan 1889). American organic chemist who joined the faculty at the University of Illinois at Urbana in 1916, which he converted into the leading centre of organic chemistry in the U.S. and forged links with industry, notably with Du Pont. Adams worked out the chemical composition of various natural substances, including chaulmoogra oil (which is used in treating leprosy), gossypol (a toxic cottonseed pigment), marijuana, and many alkaloids. He also worked in stereochemistry and with platinum catalysts and the synthesis of medicinal compounds. His name is associated with chemical warfare agent Adamsite (diphenylamine chloroarsine) and the Adams catalyst (platinum oxide or palladium oxide, used for the hydrogenation of carbon-carbon double bonds).
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