BRAIN TEASERS
The Most Difficult Tasks (page 432)

The Most Difficult Tasks (page 432)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 4311 to 4320.
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Calculate the number 8244

NUMBERMANIA: Calculate the number 8244 using numbers [9, 8, 9, 9, 54, 900] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 30
The first user who solved this task is Sanja Šabović.
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#brainteasers #math #numbermania
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Find number abc

If ab8bc + baab4 = 1aa1b1 find number abc. Multiple solutions may exist.
Correct answers: 31
The first user who solved this task is Nasrin 24 T.
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#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: 31
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind

Fig Leaf Found

A little boy opened the large old family Bible, and he looked with fascination at the ancient pages as he turned them one by one.He was still in Genesis when something fell out of the Bible. He picked it up and looked at it closely. It was a very large old tree leaf that had been pressed between the pages of the Bible long ago."Momma, look what I found!" the boy called out."What do you have there?" his mother asked.With astonishment in his voice, the young boy answered, "I think it's Adam's underwear!"
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Find number abc

If b66c2 - 280a6 = 286a6 find number abc. Multiple solutions may exist.
Correct answers: 31
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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Remove 6 letters from this seq...

Remove 6 letters from this sequence (MCIASCHAIDIIONG) to reveal a familiar English word.
Correct answers: 31
The first user who solved this task is Nasrin 24 T.
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#brainteasers #wordpuzzles
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Can you replace the question mark with a number?

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 31
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #riddles
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Calculate A-B+C*D

Look at the series (1, 5, A, 58, 179, 543, 1636, 4916, 14757, C, B, D, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A-B+C*D!
Correct answers: 31
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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Find number abc

If aaacb - b7711 = 31114 find number abc. Multiple solutions may exist.
Correct answers: 31
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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Which is a winning combination of digits?

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: 31
The first user who solved this task is Fazil Hashim.
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#brainteasers #mastermind
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Find number abc

If b80ca - c5ba6 = 62aa5 find number abc. Multiple solutions may exist.
Correct answers: 31
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math
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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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Prions

In 1997, American biology professor Stanley B. Prusiner won the Nobel Prize for medicine for discovering “prions,” described as “an entirely new genre of disease-causing agents.” The name means “proteinaceous infectious particle.” Prions cause brain diseases such as BSE (Bovine Spongiform Encephalopathy or “mad cow disease”); the human variant Creutzfeldt–Jakob disease; kuru among some peoples in New Guinea; and scrapie in sheep and goats. Prions are too small to be seen with normal microscopy. They are self-replicating, but contain no nucleic acid. Prions are highly resistant to destruction or denaturation by common chemical and physical agents such as disinfectants, formalin, heat, UV or ionizing radiation. Inceration of infected tissues requires a temperature never below 900ºF for four hours.«
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