BRAIN TEASERS
Brain Teasers (page 95)

Brain Teasers (page 95)

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 941 to 950.
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Calculate the number 983

NUMBERMANIA: Calculate the number 983 using numbers [4, 4, 9, 9, 73, 910] 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 (13, 17, 18, 20, 22, 24, 26, 28, 30, 62, 64, 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: 1
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#brainteasers #math #magicsquare
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Find number abc

If ac40c + a24a0 = 18b8ac find number abc. Multiple solutions may exist.
Correct answers: 3
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#brainteasers #math

Adam and Eve

Sometimes women are overly suspicious of their husbands.... When Adam stayed out very late for a few nights, Eve became upset.

"You're running around with other women," she told her mate.

"Eve, honey, you're being unreasonable," Adam responded. "You know you're the only woman on earth."

The quarrel continued until Adam fell asleep, only to be awakened by a strange pain in the chest. It was his darling Eve poking him rather vigorously about the torso.

"What do you think you're doing?" Adam demanded.

"Counting your ribs," said Eve.

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Calculate the number 759

NUMBERMANIA: Calculate the number 759 using numbers [9, 2, 3, 8, 88, 968] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania
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Find number abc

If aa65b - c8564 = 509a find number abc. Multiple solutions may exist.
Correct answers: 2
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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: 7
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#brainteasers #mastermind
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Calculate the number 2434

NUMBERMANIA: Calculate the number 2434 using numbers [4, 8, 4, 7, 67, 817] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
CHECK ANSWER
#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A+B*C

The aim is to place the some numbers from the list (2, 4, 5, 6, 7, 9, 31, 64, 66, 68, 90) 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: 2
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If 6c567 + 66577 = 1b51aa find number abc. Multiple solutions may exist.
Correct answers: 2
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: 5
CHECK ANSWER
#brainteasers #mastermind
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Michael J. S. Dewar

Born 24 Sep 1918; died 10 Oct 1997 at age 79. Michael James Steuart Dewar was a Scottish organic chemist who was born in India to Scottish parents in the Civil Service there, and attended boarding school in England. His career included both industrial and academic positions in England and the United States. As a theoretician, he was an early master of molecular orbital theory and wrote The Electronic Theory of Organic Chemistry (1949), the first book applying molecular orbital theory to organic chemistry. He experimental work, he studied carbenium ions, boron chemistry, superconductors, liquid crystals. the biosynthesis of fatty acids, and phenyl radicals. He developed sophisticated semi-empirical for quantitative molecular orbital methods on large organic molecules, novel ions, conjugated systems and sigma-bonded arrays He devoted much effort to the study of chemical reactivity.«
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