BRAIN TEASERS
Brain Teasers (page 246)

Brain Teasers (page 246)

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 2451 to 2460.
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MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (8, 12, 15, 16, 27, 31, 33, 34, 37, 40) 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: 15
The first user who solved this task is Nílton Corrêa de Sousa.
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#brainteasers #math #magicsquare
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Find number abc

If 98015 - ba771 = a12cc find number abc. Multiple solutions may exist.
Correct answers: 39
The first user who solved this task is Nílton Corrêa de Sousa.
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#brainteasers #math
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Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 25
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #mastermind

Oh, yeah?

Thanksgiving Day was approaching, and a family had received a Thanksgiving card with a painting of a pilgrim family on its way to church. Grandma showed the card to her small grandchildren, observing, "The pilgrim children liked to go to church with their mothers and fathers."

"Oh, yeah?" her grandson replied, "so why is their dad carrying that rifle?"

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Calculate the number 8208

NUMBERMANIA: Calculate the number 8208 using numbers [6, 7, 9, 3, 25, 807] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nílton Corrêa de Sousa.
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#brainteasers #math #numbermania
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Find number abc

If 9a76b + ba769 = acb5bc find number abc. Multiple solutions may exist.
Correct answers: 29
The first user who solved this task is Nílton Corrêa de Sousa.
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#brainteasers #math
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What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 25
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 6077

NUMBERMANIA: Calculate the number 6077 using numbers [5, 8, 6, 9, 49, 434] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Fazil Hashim.
CHECK ANSWER
#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A-B-C

The aim is to place the some numbers from the list (19, 20, 21, 27, 28, 29, 42, 64, 65, 66, 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: 11
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If a99bb - 18717 = 5118c find number abc. Multiple solutions may exist.
Correct answers: 30
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math
[link]

Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 26
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
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National light-pollution law

In 2002, the first national law prohibiting "light pollution" went into effect. The Czech Republic became the first nation to outlaw excess outdoor light. All outdoor light fixtures in the country must be shielded to ensure light goes only in the direction intended, and not above the horizontal. Czech astronomers had lobbied for the legislation. Light from street and road signs bounces off molecules in the atmosphere, making skies less dark. This light pollution is a particular problem for astronomers since even low levels of man-made light from distant cities can obscure their view of faint objects far away in space. Better designed, non-polluting light fixtures should give everyone better more energy efficiency and reduce glare on roads and in residential areas.[Image: Skyglow 120km north of Adelaide, Australia.]
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