BRAIN TEASERS
Monthly Archive - December 2025 (page 2)

Monthly Archive - December 2025 (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 76a67 - b5a62 = c1aa5 find number abc. Multiple solutions may exist.
Correct answers: 0
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: 0
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 5172

NUMBERMANIA: Calculate the number 5172 using numbers [1, 6, 4, 2, 45, 816] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
CHECK ANSWER
#brainteasers #math #numbermania

A Brain Goes To A Local Bar

A brain walks into a bar and says, "I'll have a pint of beer please."
The barman looks at him and says "Sorry, I can't serve you."
"Why not?" askes the brain.
"You're already out of your head."
Jokes of the day - Daily updated jokes. New jokes every day.
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MAGIC SQUARE: Calculate A-B-C

The aim is to place the some numbers from the list (5, 6, 8, 20, 21, 23, 24, 65, 66, 68, 97) 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 1bcca + 4bba5 = cb587 find number abc. Multiple solutions may exist.
Correct answers: 1
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: 1
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 3828

NUMBERMANIA: Calculate the number 3828 using numbers [3, 1, 3, 8, 90, 336] 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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Find number abc

If 4c7b7 - c7ca2 = b4b5 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: 1
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 3992

NUMBERMANIA: Calculate the number 3992 using numbers [5, 4, 5, 5, 85, 898] 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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Jakob Christof Le Blon

Died 16 May 1741 at age 73 (baptized 23 May 1667).German-French inventor who invented the modern system of four-colour printing. Influenced by Newton's work on the light spectrum, after many printing trials, Le Blon in 1710 proposed that three primary colours - cyan, magenta and yellow (blue, red, yellow) and black - are sufficient for mixing in varying proportions to produce all other colours. He used this process to print engravings that mimic the full colour of paintings by superimposing mezzotint plates in each primary colour. For each hand-engraved plate, the individual contribution of each colour estimated. In 1719, George I granted him a priviledge of a monopoly for the reproduction of pictures and drawings in full colour. Nevertheless, by 1725, his company failed.«[Also spelled Jacob Christoph Le Blon; in French as French Jacques-Christophe Le Blond.]
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