BRAIN TEASERS
Brain Teasers

Brain Teasers

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 1 to 10.
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MAGIC SQUARE: Calculate A+B+C

The aim is to place the some numbers from the list (7, 9, 10, 13, 15, 16, 25, 27, 28, 30, 44) 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: 5
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 a5bc6 - 25b4b = 5005b find number abc. Multiple solutions may exist.
Correct answers: 10
The first user who solved this task is Nasrin 24 T.
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#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: 8
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind

Talented Dog

A local business was looking for office help. They put a sign in the window, stating the following: "HELP WANTED. Must be able to type, must be good with a computer and must be bilingual. We are an Equal Opportunity Employer."

A short time afterwards, a dog trotted up to the window, saw the sign and went inside. He looked at the receptionist and wagged his tail, then walked over to the sign, looked at it and whined.

Getting the idea, the receptionist got the office manager. The office manager looked at the dog and was surprised, to say the least. However, the dog looked determined, so he lead him into the office. Inside, the dog jumped up on the chair and stared at the manager.

The manager said "I can't hire you. The sign says you have to be able to type." The dog jumped down, went to the typewriter and proceeded to type out a perfect letter. He took out the page and trotted over to the manager and gave it to him, then jumped back on the chair.

The manager was stunned, but then told the dog "the sign says you have to be good with a computer." The dog jumped down again and went to the computer. The dog proceeded to enter and execute a perfect program, that worked flawlessly the first time.

By this time the manager was totally dumb-founded! He looked at the dog and said "I realize that you are a very intelligent dog and have some interesting abilities. However, I *still* can't give you the job."

The dog jumped down and went to a copy of the sign and put his paw on the sentences that told about being an Equal Opportunity Employer. The manager said "yes, but the sign *also* says that you have to be bilingual."

The dog looked at the manager calmly and said, "Meow!"

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Calculate the number 564

NUMBERMANIA: Calculate the number 564 using numbers [8, 3, 6, 2, 64, 932] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 6
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 c71bc + 2b844 = b4aa7 find number abc. Multiple solutions may exist.
Correct answers: 11
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: 9
The first user who solved this task is Fazil Hashim.
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#brainteasers #mastermind
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Calculate the number 2708

NUMBERMANIA: Calculate the number 2708 using numbers [2, 1, 8, 2, 11, 904] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 6
The first user who solved this task is Nasrin 24 T.
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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, 14, 24, 25, 29, 34, 37, 65, 66, 70) 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: 5
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 a6449 + a68b4 = 1bcc0c find number abc. Multiple solutions may exist.
Correct answers: 10
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#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: 9
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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The aim is to place the some numbers from the list (7, 9, 10, 13, 15, 16, 25, 27, 28, 30, 44) 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.
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Jean le Rond D'Alembert

Died 29 Oct 1783 at age 65 (born 16 Nov 1717). French mathematician known for his work in various fields of applied mathematics, in particular dynamics. In 1743 he published his Traité de dynamique (Treatise on Dynamics). The d'Alembert principle extends Newton's third law of motion, that Newton's law holds not only for fixed bodies but also for free moving bodies. D'Alembert also wrote on fluid dynamics, the theory of winds, the properties of vibrating strings and conducted experiments on the properties of sound . His most significant purely mathematical innovation was his invention and development of the theory of partial differential equations. He published eight volumes of mathematical studies (1761-80). He was editor of the mathematical and scientific articles for Denis Diderot's Encyclopédie.
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