BRAIN TEASERS
Brain Teasers (page 269)

Brain Teasers (page 269)

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 2681 to 2690.
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (5, 7, 8, 30, 32, 34, 35, 72, 74, 75, 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: 14
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 26b9c + 58c5b = 8515a find number abc. Multiple solutions may exist.
Correct answers: 37
The first user who solved this task is Nasrin 24 T.
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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: 18
The first user who solved this task is Nílton Corrêa de Sousa.
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#brainteasers #mastermind

A boy was assigned a paper on...

A boy was assigned a paper on childbirth and asked his parents, "How was I born?"
"Well honey..." said the slightly prudish parent. "The stork brought you to us."
"Ohh..." said the boy. "Well, how did you and daddy get born?" he asked.
"Oh, your grandparents found us under a rock."
"Well how were grandpa and grandma born?" he persisted.
"Well darling, they were found under a cabbage leaf," said the parent.
Several days later, the boy handed in his paper to the teacher who read with confusion the opening sentence: "This report has been very difficult to write due to the fact that there hasn't been a natural childbirth in my family for three generations."
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Calculate the number 670

NUMBERMANIA: Calculate the number 670 using numbers [6, 3, 6, 6, 21, 377] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
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 691c5 - a492a = a41b2 find number abc. Multiple solutions may exist.
Correct answers: 26
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: 19
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 802

NUMBERMANIA: Calculate the number 802 using numbers [9, 6, 1, 1, 19, 740] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 15
The first user who solved this task is Nílton Corrêa de Sousa.
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 (3, 4, 8, 10, 20, 21, 25, 71, 72, 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: 14
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If b829a + 3cc29 = 994c9 find number abc. Multiple solutions may exist.
Correct answers: 25
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math
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Find the right 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: 24
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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First telephone twang

In 1875, Alexander Bell and his assistant Thomas Watson had been working on the "harmonic telegraph". In the transmitter room, Watson had been trying to free a reed that had been too tightly wound to the pole of its electromagnet, when it produced a twang. Bell, who had been working in the receiving room heard the twang. He realized that now his dream of speech transmission must be a possibility, for the complex overtones and timbre of the twang he had just heard had a lot in common with the sound of the human voice. The next day, they continued tinkering on their experiment, anxious to achieve more ambitious results.[Image: diagram of earlier device under test in Winter 1873]
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