BRAIN TEASERS
Monthly Archive - January 2026 (page 2)

Monthly Archive - January 2026 (page 2)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 11 to 20.
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Find number abc

If c0490 - b8aab = 21a1a find number abc. Multiple solutions may exist.
Correct answers: 0
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: 0
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 3490

NUMBERMANIA: Calculate the number 3490 using numbers [1, 6, 9, 8, 42, 316] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
CHECK ANSWER
#brainteasers #math #numbermania

An older man, not in the best...

An older man, not in the best physical condition, asked the trainer in the gym, "I want to impress that beautiful girl. Which machine should I use?"
The trainer replied...
"Use the ATM machine outside the gym!"
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Find number abc

If 97ccb - a5b79 = 7b8aa find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math
[link]

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 3468

NUMBERMANIA: Calculate the number 3468 using numbers [9, 1, 8, 9, 21, 273] 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 (9, 10, 11, 15, 16, 17, 28, 29, 30, 74, 82) 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 ba4ba + b614c = 495c0 find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math
[link]

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
[link]

Calculate the number 9399

NUMBERMANIA: Calculate the number 9399 using numbers [2, 8, 7, 4, 99, 901] 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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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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