BRAIN TEASERS

Daily Brain Teasers for Monday, 08 December 2025

Daily Brain Teasers for Monday, 08 December 2025 puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ...

Calculate the number 1669

NUMBERMANIA: Calculate the number 1669 using numbers [3, 5, 9, 6, 39, 344] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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#brainteasers #math #numbermania

Find number abc

If 9c3bc - ccc0b = 19ab2 find number abc. Multiple solutions may exist.
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#brainteasers #math

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.
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#brainteasers #mastermind

Two men, one American and an I...

Two men, one American and an Indian were sitting in a bar drinking shot after shot.
The Indian man said to the American, "You know my parents are forcing me to get married to this so called homely girl from a village whom I haven't even met once. We call this arranged marriage. I don't want to marry a woman whom I don't love... I told them that openly and now have a hell lot of family problems."
The American said, "Talking about love marriages... I'll tell you my story. I married a widow whom I deeply loved and dated for 3 years. After a couple of years, my father fell in love with my step-daughter and so my father became my son-in-law and I became my father's father-in-law. My daughter is my mother and my wife my grandmother.
More problems occurred when I had a son. My son is my father's brother and so he is my uncle. Situations turned worse when my father had a son. Now my father's son i.e. my brother is my grandson. Ultimately, I have become my own grand father and I am my own grandson. And you say you have family problems?"
Jokes of the day - Daily updated jokes. New jokes every day.

Calculate the number 2178

NUMBERMANIA: Calculate the number 2178 using numbers [8, 3, 5, 5, 99, 970] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
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#brainteasers #math #numbermania

George Boole

Died 8 Dec 1864 at age 49 (born 2 Nov 1815). English mathematician and logician who helped establish modern symbolic logic and an algebra of logic, now called Boolean algebra. By replacing logical operations by symbols, Boole showed that the operations could be manipulated to give logically consistent results. Boole's logical algebra is essentially an algebra of classes, being based on such concepts as complement and union of classes. The study of mathematical or symbolic logic developed mainly from his ideas, and is basic to the design of digital computer circuits. Boolean algebras also find important applications in such diverse fields as topology, measure theory, probability and statistics. Boole also wrote important works on differential equations and other branches of mathematics.

MAGIC SQUARE: Calculate A-B+C

The aim is to place the some numbers from the list (5, 8, 10, 12, 18, 21, 23, 33, 36, 38, 83) 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.
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#brainteasers #math #magicsquare

Find number abc

If cb55c - a0c06 = bbbc8 find number abc. Multiple solutions may exist.
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#brainteasers #math

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.
CHECK ANSWER
#brainteasers #mastermind

Calculate the number 3316

NUMBERMANIA: Calculate the number 3316 using numbers [9, 4, 7, 7, 45, 761] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
CHECK ANSWER
#brainteasers #math #numbermania

Find number abc

If a02b4 + 477c0 = cb7a44 find number abc. Multiple solutions may exist.
CHECK ANSWER
#brainteasers #math

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.
CHECK ANSWER
#brainteasers #mastermind
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