BRAIN TEASERS
Brain Teasers (page 199)

Brain Teasers (page 199)

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 1981 to 1990.
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Calculate the number 3393

NUMBERMANIA: Calculate the number 3393 using numbers [8, 9, 7, 6, 51, 182] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 15
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #numbermania
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Find number abc

If b66c2 - 280a6 = 286a6 find number abc. Multiple solutions may exist.
Correct answers: 31
The first user who solved this task is Nasrin 24 T.
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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: 36
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind

On their first date, a man ask...

On their first date, a man asked his companion if she'd like a drink with dinner. "Oh, no, what would I tell my Sunday school class?" she said.
Later, he offered her a cigarette. "Oh, no, what would I tell my Sunday school class?" she said again.
On the drive home, he saw a motel. Figuring he had nothing to lose, he asked if she wanted to stop in there.
"Okay," his date replied.
"What will you tell your Sunday school class?" he asked, shocked.
"The same thing I always tell them. 'You don't have to drink or smoke to have a good time.'"
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Calculate the number 4450

NUMBERMANIA: Calculate the number 4450 using numbers [4, 5, 7, 2, 25, 898] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 12
The first user who solved this task is Nílton Corrêa de Sousa.
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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 (4, 6, 7, 15, 17, 18, 35, 37, 38) 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.
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#brainteasers #math #magicsquare
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Find number abc

If ccc99 + a120c = 1b6a04 find number abc. Multiple solutions may exist.
Correct answers: 20
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 Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 9017

NUMBERMANIA: Calculate the number 9017 using numbers [9, 7, 9, 3, 38, 495] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 35
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If cbaba + a7a59 = 10ac45 find number abc. Multiple solutions may exist.
Correct answers: 33
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: 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.
Last Correct Answer

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Karl George Christian von Staudt

Died 1 Jun 1867 at age 69 (born 24 Jan 1798).German mathematician who developed the first complete theory of imaginary points, lines, and planes in projective geometry. His early work was on determining the orbit of a comet and, based on this work, he received his doctorate. He showed how to construct a regular inscribed polygon of 17 sides using only compasses. He turned to projective geometry and Bernoulli numbers (discovered by Jacob Bernoulli). An important work on projective geometry, Geometrie der Lage was published in 1847. It was the first work to completely free projective geometry from any metrical basis. He also gave a geometric solution to quadratic equations.
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