BRAIN TEASERS
The Most Difficult Tasks (page 91)

The Most Difficult Tasks (page 91)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 901 to 910.
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Find number abc

If aaac7 + 2ab86 = 6880b find number abc. Multiple solutions may exist.
Correct answers: 1
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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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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

Jonah's Fate

After hearing the story of Jonah at Sunday School, a little girl repeated the story at school on Monday.
Her teacher said it was physically impossible for a whale to swallow a human because, even though it is a very large mammal, its throat is very small.
The little girl said, "But how can that be? Jonah was swallowed by a whale."Irritated, the teacher reiterated that a whale could not swallow a human. "It is physically impossible!" she said.
Undaunted, the little girl said, "Well, when I get to heaven I will ask Jonah."
To this, the teacher said, "What if Jonah went to hell?"
The little girl replied, "Then YOU ask him!"
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Calculate the number 561

NUMBERMANIA: Calculate the number 561 using numbers [2, 3, 2, 9, 76, 660] 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 4ba54 - c797a = 8a8a find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (2, 4, 6, 22, 24, 26, 37, 39, 41, 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: 1
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#brainteasers #math #magicsquare
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Find number abc

If 8cc60 + 66a2b = 15028b find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Find number abc

If ca503 + c95b4 = 3a0b7 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 7959

NUMBERMANIA: Calculate the number 7959 using numbers [9, 7, 1, 3, 72, 484] 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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MAGIC SQUARE: Calculate A*B*C

The aim is to place the some numbers from the list (8, 10, 12, 14, 19, 21, 53, 57, 61, 64, 99) 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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Lewis Fry Richardson

Died 30 Sep 1953 at age 71 (born 11 Oct 1881). British physicist and psychologist who first applied mathematics to accurate weather prediction. Richardson applied the mathematical method of finite differences to predicting the weather (1922). In his life, he held various posts: at the National Physical Laboratory, the Meteorological Office, and several university posts in physics or technology. Also, he was a chemist with National Peat Industries and in charge of the physical and chemical laboratory of the Sunbeam Lamp Co. Early application of mathematical techniques for systematically forecasting the weather were limited by extensive computation time: three months to predict weather for the next 24 hours. With electronic computers available after WW II made his methods became practical. He wrote several books applying mathematics to the causes of war. He contributed to calculus and the theory of diffusion for eddy-diffusion in the atmosphere. The Richardson number, a quantity involving gradients (change over distance) of temperature and wind velocity, is named after him.
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