BRAIN TEASERS
Monthly Archive - August 2023

Monthly Archive - August 2023

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... 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 (15, 17, 22, 27, 29, 30, 32, 34, 37, 96) 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
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#brainteasers #math #magicsquare
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Find number abc

If cc544 + 2b3a5 = 1a5b49 find number abc. Multiple solutions may exist.
Correct answers: 1
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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: 4
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#brainteasers #mastermind

It was the middle of the night...

It was the middle of the night. Suddenly there was a loud rapping on the doctor’s door, followed by a groan. The doctor angrily thrust his head out of the window. “WELL?” he shouted.
“No,” moaned the man. “Sick.”
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Calculate the number 1643

NUMBERMANIA: Calculate the number 1643 using numbers [5, 4, 6, 2, 97, 439] 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 57587 - 3c5b1 = a30ab find number abc. Multiple solutions may exist.
Correct answers: 1
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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: 4
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 7841

NUMBERMANIA: Calculate the number 7841 using numbers [6, 7, 5, 9, 44, 517] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
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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 (2, 4, 8, 29, 31, 35, 54, 55, 56, 60, 99) 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
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If cc358 - abc58 = 2cb00 find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#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: 3
CHECK ANSWER
#brainteasers #mastermind
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Electric street car

In 1880, Stephen D. Field of New York City was issued a U.S. patent for "propelling railway cars by electromagnetism" (No. 229,991). When he first used it on a street car in an electric street car in 1874, his inntion was the first electric streetcar to run successfully with current generated by a stationary dynamo. The current was conveyed by one of the rails, via a metal wheel to the onboard motor, and returned through a second metal wheel to the other rail. Field first filed for a caveat on 21 May 1879, and when issued, the patent protected his claim for this system of supplying electric power through the rails and to the motor.
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