BRAIN TEASERS
The Most Difficult Tasks (page 145)

The Most Difficult Tasks (page 145)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1441 to 1450.
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MAGIC SQUARE: Calculate A+B-C

The aim is to place the some numbers from the list (5, 7, 8, 22, 23, 25, 26, 29, 30, 32, 33, 34, 40) 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: 3
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MAGIC SQUARE: Calculate A*B+C

The aim is to place the some numbers from the list (5, 6, 14, 17, 18, 20, 21, 26, 29, 36, 63, 69) 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: 3
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#brainteasers #math #magicsquare
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MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (1, 2, 4, 5, 6, 8, 42, 43, 44, 46, 67) 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: 3
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#brainteasers #math #magicsquare

A fellow nurse at my hospital ...

A fellow nurse at my hospital received a call from an anxious patient.
"I'm diabetic and I'm afraid I've had too much sugar today." the caller said.
"Are you light-headed?" my colleague asked.
"No," the caller answered, "I'm a brunette."
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Calculate the number 1179

NUMBERMANIA: Calculate the number 1179 using numbers [6, 4, 9, 9, 33, 231] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
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#brainteasers #math #numbermania
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Calculate the number 1785

NUMBERMANIA: Calculate the number 1785 using numbers [5, 6, 5, 9, 43, 342] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
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#brainteasers #math #numbermania
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Calculate the number 2394

NUMBERMANIA: Calculate the number 2394 using numbers [8, 6, 1, 8, 84, 265] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
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#brainteasers #math #numbermania
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Calculate the number 8638

NUMBERMANIA: Calculate the number 8638 using numbers [7, 3, 7, 5, 99, 815] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
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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 (4, 5, 12, 13, 14, 17, 21, 31, 32, 39) 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: 3
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#brainteasers #math #magicsquare
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MAGIC SQUARE: Calculate A-B-C

The aim is to place the some numbers from the list (6, 7, 13, 19, 20, 22, 23, 26, 29) 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: 3
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#brainteasers #math #magicsquare
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Find number abc

If abbc4 - abc70 = 2b4 find number abc. Multiple solutions may exist.
Correct answers: 4
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#brainteasers #math
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Parity nonconservation proposed

In 1956, The Physical Review published a paper by Tsung Dao Lee and Chen Ning Yang on the Question of Parity Conservation in Weak Interactions. They addressed an issue that had long been believed, but for which there had been no experimental support. Yet, there existed a Theta-Tau Puzzle (C.F. Powell, 1949) in the disintegration of certain cosmic ray particles via the nuclear weak force. Lee and Yang believed this was because of parity violation, which contradicted the generally accepted "law" of conservation of parity. They proposed a study of experiments involving weak interactions. Chien-Shiung Wu validated non-conservation of parity on 27 Dec 1956 in their suggestion to study beta decay of cobalt-60.«
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