BRAIN TEASERS
The Most Difficult Tasks (page 85)

The Most Difficult Tasks (page 85)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 841 to 850.
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Find number abc

If c24b1 + aa420 = 1478a1 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 (10, 12, 15, 16, 17, 18, 19, 21, 22, 56, 88) 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 75ab8 - 1ac54 = 5c254 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math

Nun of Your Business

While shopping in a food store, two nuns happened to pass by the beer, wine, and liquor section. One asked the other if she would like a beer.The second nun answered that, indeed, it would be very nice to have one, but that she would feel uncomfortable purchasing it.The first nun replied that she would handle it without a problem. She picked up a six-pack and took it to the cashier. The cashier was surprised, so the nun said, “This is for washing our hair.”Without blinking an eye, the cashier reached under the counter and put a package of pretzel sticks in the bag with the beer.“The curlers are on me.”-
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Find number abc

If 70ba9 + a4ccb = 12a197 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 714

NUMBERMANIA: Calculate the number 714 using numbers [2, 2, 1, 1, 87, 542] 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 (1, 5, 8, 10, 24, 28, 31, 37, 39, 43, 46, 58) 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 7524

NUMBERMANIA: Calculate the number 7524 using numbers [2, 8, 6, 1, 41, 947] 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 b9a6b - 4c6c9 = ca928 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 386

NUMBERMANIA: Calculate the number 386 using numbers [7, 7, 4, 3, 54, 196] 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 (5, 7, 9, 12, 14, 16, 27, 29, 31, 59, 89) 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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Pluto

In 1841, John Couch Adams decided to determine the position of an unknown planet by the irregularities it causes in the motion of Uranus. He entered in his journal; "Formed a design in the beginning of this week in investigating, as soon as possible after taking my degree, the irregularities in the motion of Uranus... in orderto find out whether they may be attributed to the action of an undiscovered planet beyond it..." In Sep 1845 he gave James Challis, director of the Cambridge Observatory, accurate information on where the new planet, as yet unobserved, could be found; but unfortunately the planet was not recognized at Cambridge until much later, after its discovery at the Berlin Observatory on 23 Sep 1846.
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