BRAIN TEASERS
Monthly Archive - May 2025

Monthly Archive - May 2025

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10.
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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: 1
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 1145

NUMBERMANIA: Calculate the number 1145 using numbers [1, 5, 2, 9, 50, 558] 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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MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (4, 6, 14, 23, 25, 33, 34, 36, 44, 62, 91) 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

Mommy, my turtle is dead...

"Mommy, my turtle is dead," the little boy, Freddie, sorrowfully told his mother, holding the turtle out to her.
The mother kissed him on the head, then said, "That's all right. We'll wrap him in tissue paper, put him in a little box, then have a nice burial ceremony in the back yard. After that, we'll go out for an ice cream soda, and then get you a new pet. I don't want you...." Her voice trailed off as she noticed the turtle move.
"Freddie, your turtle is not dead after all."
"Oh," the disappointed boy said. "Can I kill it?"
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Find number abc

If 77b05 - 6ba61 = 1bcaa find number abc. Multiple solutions may exist.
Correct answers: 1
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: 1
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 9848

NUMBERMANIA: Calculate the number 9848 using numbers [7, 8, 4, 9, 11, 887] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If c5ba0 - 4ab4b = 23bca 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: 2
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 4100

NUMBERMANIA: Calculate the number 4100 using numbers [5, 6, 7, 9, 26, 609] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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 (20, 22, 24, 28, 30, 32, 52, 54, 56, 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: 1
CHECK ANSWER
#brainteasers #math #magicsquare
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Rotolactor

In 1930, the Rotolactor, invented by Henry W. Jeffries, was housed in the lactorium of the Walker Gordon Laboratory Company, Inc., at Plainsboro, N.J. This was a 50-stall revolving platform that enabled the milking of 1,680 cows in seven hours by rotating them into position with the milking machines. A Rotolactor was displayed at the 1939 New York World's Fair as part of the "Dairy World of Tomorrow," exhibit in the Borden building. The glass-enclosed revolving Rotolactor platform carried 150 pedigreed cows were washed, dried, and mechanically milked twice daily. A favorite attraction of the Food Zone, the Rotolactor epitomized how technology advanced the production of such a widely-used product as milk.
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