BRAIN TEASERS
Math (page 32)

Math (page 32)

These are fun math riddles. All of these tricky riddles are based on real math concepts and can be solved with purely math and logic. These are the tasks listed 311 to 320.
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Find number abc

If 77b05 - 6ba61 = 1bcaa find number abc. Multiple solutions may exist.
Correct answers: 1
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Calculate the number 9848

NUMBERMANIA: Calculate the number 9848 using numbers [7, 8, 4, 9, 11, 887] 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 c5ba0 - 4ab4b = 23bca find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math

Saskatchewan has huge methane...

Saskatchewan has huge methane reserves – it must be one of the flatus places on Earth.
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Calculate the number 4100

NUMBERMANIA: Calculate the number 4100 using numbers [5, 6, 7, 9, 26, 609] 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 (20, 22, 24, 28, 30, 32, 52, 54, 56, 79) 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 b64a3 + 647a6 = a6aacb find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math
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Calculate the number 679

NUMBERMANIA: Calculate the number 679 using numbers [1, 2, 7, 2, 76, 599] 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 8caac + 26260 = 111b0c find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 6472

NUMBERMANIA: Calculate the number 6472 using numbers [1, 5, 7, 3, 56, 754] 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 (11, 13, 15, 18, 20, 22, 25, 27, 29, 60, 76) 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
CHECK ANSWER
#brainteasers #math #magicsquare
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Refrigerator patent

In 1899, Albert T. Marshall of Brockton, of Brockton, Mass., received a U.S. patent for a refrigerator, titled “Automatic Refrigerating Apparatus.” It was “to provide means for automatically regulating the admission of the refrigerating medium [anhyrous ammonia] to the expansion pipes or chambers; second, to combine a thermostat and rheostat to automatically control” the pump motor. He also added an automatic motor cut-off in case it was needed, and a means for automatically regulating the water used for cooling the refrigerant. For the next quarter century, he filed more patents, assigning them to the Automatic Refrigeration Company which introduced its first household refrigerators in 1914. By 1918 they introduced their first refrigerator with automatic control. The company became Kelvinator Corp. (24 Sep 1917). «
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