BRAIN TEASERS
Math (page 78)

Math (page 78)

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 771 to 780.
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Calculate the number 5371

NUMBERMANIA: Calculate the number 5371 using numbers [9, 5, 7, 6, 33, 370] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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Find number abc

If b7c07 + 6acba = 11cbac find number abc. Multiple solutions may exist.
Correct answers: 1
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Calculate the number 1384

NUMBERMANIA: Calculate the number 1384 using numbers [9, 9, 7, 4, 27, 639] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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When people walk away

When people walk away, let them. Your future is not about people who walk away, it's about people who stay in it for the ride.
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MAGIC SQUARE: Calculate A+B+C

The aim is to place the some numbers from the list (6, 7, 12, 24, 25, 30, 36, 37, 42, 97) 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: 4
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#brainteasers #math #magicsquare
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Find number abc

If bc32b + c2584 = abacaa find number abc. Multiple solutions may exist.
Correct answers: 4
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Calculate the number 7983

NUMBERMANIA: Calculate the number 7983 using numbers [9, 1, 8, 3, 36, 867] 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 647b2 - 62cb1 = 18a1 find number abc. Multiple solutions may exist.
Correct answers: 8
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Calculate the number 1941

NUMBERMANIA: Calculate the number 1941 using numbers [8, 3, 6, 6, 40, 577] 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 (9, 10, 13, 14, 15, 18, 24, 25, 28, 62) 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 c6411 + 1cb2b = 4a4c1 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Arago announces electromagnetism

In 1820, Francois Arago announced that a copper wire between the poles of a voltaic cell, could laterally attract iron filings to itself (Ann. de Chim. et de Physique., xv. p.93). His discovery came in the same year that Oersted discovered that an electric current flowing in a wire would deflect a neighbouring compass needle. Arago in the same publication described how he had successfully succeeded in causing permanent magnetism in steel needles laid at right angles to the copper wire. Arago and André-Marie Ampère, discussed and experimented with forming the copper wire into a helix to intensify the magnetizing action. However, it was not until 1825 that the electromagnet in its familiar form was invented by William Sturgeon.«
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