BRAIN TEASERS
Monthly Archive - February 2025

Monthly Archive - February 2025

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10.
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Calculate the number 401

NUMBERMANIA: Calculate the number 401 using numbers [3, 7, 3, 1, 26, 340] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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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 (1, 4, 5, 15, 18, 19, 23, 70, 73, 74) 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: 0
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If acbba + aa615 = 16b613 find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math

A passenger in a taxi leaned o...

A passenger in a taxi leaned over to ask the driver a question and tapped him on the shoulder. The driver screamed, lost control of the cab, nearly hit a bus, drove up over the curb, and stopped just inches from a large plate glass window.

For a few moments everything was silent in the cab, and then the still shaking driver said, "I'm sorry but you scared the daylights out of me."

The frightened passenger apologized to the driver and said he didn't realize a mere tap on the shoulder could frighten him so much.

The driver replied, "No, no, I'm sorry, it's entirely my fault. Today is my first day driving a cab. I've been driving a hearse for the last 25 years."

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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: 0
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 495

NUMBERMANIA: Calculate the number 495 using numbers [6, 2, 2, 6, 27, 445] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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#brainteasers #math #numbermania
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Find number abc

If c9bb7 - c88ca = 5a6 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: 1
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 1532

NUMBERMANIA: Calculate the number 1532 using numbers [5, 9, 4, 2, 69, 426] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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 (17, 19, 20, 22, 24, 25, 27, 33, 36, 41) 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: 0
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If c14cb - b9962 = 1a2a find number abc. Multiple solutions may exist.
Correct answers: 0
CHECK ANSWER
#brainteasers #math
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Channel tunnel proposed

In 1855, a proposal for a tunnel under the English Channel was reported in the New York Daily Times, which, according to French engineer M. Loèpold Favre, would in five years connect Boulogne to Dover. The 18½ mile (30-km) tunnel under the Channel would also need about 1½ mile (2-km) under the shores for each approach at the ends. Excavated at no less than 82-ft (25-m) below the sea bed, the tunnel would be lined with a double arch: one of granite and impermeable cement and an inner arch of thin, iron plates with perforations to reveal even slight leakage. Instead of smoke-producing locomotives, an atmospheric railway using a compressed air tube would carry passengers and freight such as coal. Ventilation shafts would rise above the highest water level in islands formed by excavated rock.«
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