Daily Brain Teasers for Monday, 20 October 2025
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Calculate the number 1609
NUMBERMANIA: Calculate the number 1609 using numbers [8, 4, 6, 1, 43, 789] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
Find number abc
If 62a66 + a46cb = 13a42c find number abc. Multiple solutions may exist.
#brainteasers #math
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.
#brainteasers #mastermind
Go For Broke
Someone once told me, “GO FOR BROKE!”
I’m happy to report that I succeeded.
Calculate the number 6332
NUMBERMANIA: Calculate the number 6332 using numbers [9, 8, 4, 8, 39, 762] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
Sir Christopher WrenBorn 20 Oct 1632; died 25 Feb 1723 at age 90. English architect, mathematician and astronomer who was the greatest among the country's architects of his time. While at Wadham College, Oxford (1649), he joined a group of brilliant scholars, who later founded the Royal Society (president 1680-82). Wren learned scientific skills as an assistant to an eminent anatomist. Through astronomy, he developed skills in working models, diagrams and charting that proved useful when he entered architecture. After London's Great Fire of 1666, Wren presented a scheme to rebuild the city, though only partially realized. He designed many buildings including St. Paul's Cathedral and 53 churches. He invented a “weather clock” similar to a modern barometer, new engraving methods, and helped develop a blood transfusion technique. His scientific work was highly regarded by Sir Isaac Newton as stated in the Principia. |
MAGIC SQUARE: Calculate A*B+C
The aim is to place the some numbers from the list (24, 25, 27, 29, 30, 32, 57, 66, 67, 69, 75) 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.
#brainteasers #math #magicsquare
Find number abc
If bb31c + 2b14a = 8a4bc find number abc. Multiple solutions may exist.
#brainteasers #math
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.
#brainteasers #mastermind
Calculate the number 768
NUMBERMANIA: Calculate the number 768 using numbers [2, 1, 9, 5, 42, 380] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
Find number abc
If a11a0 - 3cb47 = b8643 find number abc. Multiple solutions may exist.
#brainteasers #math
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.
#brainteasers #mastermind
