Daily Brain Teasers for Sunday, 14 December 2025
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Find number abc
If 4c7b7 - c7ca2 = b4b5 find number abc. Multiple solutions may exist.
#brainteasers #math
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.
#brainteasers #mastermind
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.
#brainteasers #math #numbermania
What Should They Get?
Mrs. Applebee, the 6th grade teacher, posed the following problem to one of her classes:
"A wealthy man dies and leaves ten million dollars. One-fifth is to go to his wife, one-fifth is to go to his son, one-sixth to his butler, and the rest to charity. Now, what does each get?"
After a very long silence in the classroom, Little Johnny raised his hand.
The teacher called on Little Johnny for his answer.
With complete sincerity in his voice, Little Johnny answered, "A lawyer!"
"A wealthy man dies and leaves ten million dollars. One-fifth is to go to his wife, one-fifth is to go to his son, one-sixth to his butler, and the rest to charity. Now, what does each get?"
After a very long silence in the classroom, Little Johnny raised his hand.
The teacher called on Little Johnny for his answer.
With complete sincerity in his voice, Little Johnny answered, "A lawyer!"
MAGIC SQUARE: Calculate A*B+C
The aim is to place the some numbers from the list (13, 16, 20, 22, 23, 25, 26, 29, 30, 62, 92) 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
George WashingtonDied 14 Dec 1799 at age 67 (born 22 Feb 1732). American surveyor, military leader and president who was an eager student of mathematics in his youth, teaching himself geometry and trigonometry. This led to his early career as a surveyor, proficient at drafting, mapmaking, and designing tables of data. Surveying let him explore regions of Virgina, and earn income to be a landowner by age 19. Mathematics courses in early American education included applications in surveying. For example, it was part of state law in Massachusetts (1827) that any locality with 500 families should have a master capable of instructing “geometry, surveying and algebra.” Thus, long before that law, in a less-known aspect of his life, Washington was equipped with a technical education of service to his community—although he is most famous for fighting in the Revolutionary war and becoming the the first President of the U.S.A.« |
Find number abc
If ba6aa - a0c91 = 1a2b6 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 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.
#brainteasers #math #numbermania
Find number abc
If 9c3bc - ccc0b = 19ab2 find number abc. Multiple solutions may exist.
#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.
#brainteasers #mastermind
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.
#brainteasers #math #numbermania
