BRAIN TEASERS
The Most Difficult Tasks (page 56)

The Most Difficult Tasks (page 56)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 551 to 560.
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Calculate the number 2768

NUMBERMANIA: Calculate the number 2768 using numbers [3, 8, 1, 3, 28, 673] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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Find number abc

If 9ca66 - 39b6b = a13c4 find number abc. Multiple solutions may exist.
Correct answers: 0
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Calculate the number 3587

NUMBERMANIA: Calculate the number 3587 using numbers [7, 4, 4, 9, 83, 718] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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#brainteasers #math #numbermania

While giving a physical the do...

While giving a physical the doctor noticed that his patient's shins were covered with dark bruises.

"Tell me," said the doctor, "do you play hockey or soccer?"

"Neither," said the man. "My wife and I play bridge."
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MAGIC SQUARE: Calculate A*B+C

The aim is to place the some numbers from the list (7, 8, 11, 20, 21, 24, 49, 59, 66, 67, 70) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B+C.
Correct answers: 0
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#brainteasers #math #magicsquare
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Find number abc

If 9c787 + bb2ab = c3a05c find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math
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Calculate the number 2102

NUMBERMANIA: Calculate the number 2102 using numbers [8, 3, 1, 6, 23, 195] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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#brainteasers #math #numbermania
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Find number abc

If 3c8a6 + c660a = abc0c find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math
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Calculate the number 8773

NUMBERMANIA: Calculate the number 8773 using numbers [5, 8, 8, 1, 97, 668] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A*B+C

The aim is to place the some numbers from the list (6, 7, 9, 10, 11, 12, 19, 22, 24, 60) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B+C.
Correct answers: 0
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If ac3a7 - cbb1c = c3a4a find number abc. Multiple solutions may exist.
Correct answers: 0
CHECK ANSWER
#brainteasers #math
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Auguste Laurent

Born 14 Nov 1807; died 23 Apr 1853 at age 45. French chemist who developed organic chemistry as a distinct science. For a while, he assisted Jean Dumas, and extended his work, understanding organic compounds as derivatives of hydrocarbon molecules. In crystallography he was influenced by René-Just Haüy. Laurent recognised that carbon atoms formed bonds based on a pyramid structure. Furthermore, against the opinion of many peers, he rejected the idea held by Jöns Berzelius that even organic molecules were formed from positively and negatively charged entities. Laurent showed (1836) that a supposedly positive-charge hydrogen atom could be replaced by a supposedly negative-charge chlorine atom. He recognised families of organic compounds with characteristic groups. He died in middle age from tuberculosis.«
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