BRAIN TEASERS
The Most Difficult Tasks (page 54)

The Most Difficult Tasks (page 54)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 531 to 540.
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Find number abc

If a65ca - a40a6 = b44c find number abc. Multiple solutions may exist.
Correct answers: 0
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Calculate the number 6030

NUMBERMANIA: Calculate the number 6030 using numbers [3, 3, 8, 4, 76, 787] 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 919aa - bb0c7 = c9877 find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math

Why is Santa Claus so jolly?

Why is Santa Claus so jolly?
Because he knows where all the naughty girls live.
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Calculate the number 8508

NUMBERMANIA: Calculate the number 8508 using numbers [8, 5, 7, 5, 13, 650] 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, 14, 15, 24, 25, 26, 54, 58, 59, 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
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#brainteasers #math #magicsquare
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Find number abc

If cbac2 + ba090 = 1a1ca2 find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math
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Calculate the number 873

NUMBERMANIA: Calculate the number 873 using numbers [5, 8, 8, 7, 15, 823] 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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Calculate the number 2508

NUMBERMANIA: Calculate the number 2508 using numbers [3, 8, 4, 9, 87, 328] 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 (2, 7, 8, 10, 13, 28, 29, 31, 39, 40, 42) 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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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
CHECK ANSWER
#brainteasers #math #numbermania
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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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