Daily Brain Teasers for Sunday, 16 November 2025
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Find number abc
If 380ab + c9bac = 97b3a find number abc. Multiple solutions may exist.
#brainteasers #math
Calculate the number 5140
NUMBERMANIA: Calculate the number 5140 using numbers [2, 6, 1, 7, 12, 648] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
MAGIC SQUARE: Calculate A*B-C
The aim is to place the some numbers from the list (7, 8, 9, 16, 26, 27, 31, 32, 34, 39, 78) 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
Not Talking To Me
Me to the postman: This empty envelope must be from my sister Charlotte.
Postman: Now why would she send you an empty envelope?
Me: We had an argument, and she's not talking to me..
Find number abc
If abc2b + 77c2a = c3a2a3 find number abc. Multiple solutions may exist.
#brainteasers #math
Rudolf PintnerBorn 16 Nov 1884; died 7 Nov 1942 at age 57.English-American psychologist who combined interests in mental measurements and education of people with disabilities. His performance assessment measures supplied half of the items of the World War I Army Beta Test. He directed many surveys in his field and wrote a number of scientific works. A Scale of Performance Tests (1917) by Rudolf Pintner and Donald G. Paterson, introduced the Pintner-Paterson Performance Test, the first test of nonverbal intelligence. It was intended as a "supplemental" test to the 1908 Binet battery (which they criticized as unwarrantably favorable to the verbal aspects of individual intelligence). They insisted that there was more than one aspect of intelligence and more than one way of measuring it.[Image: Picture Completion puzzle, part of the Pintner & Paterson's clinical style performance scale (1917)] |
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 5454
NUMBERMANIA: Calculate the number 5454 using numbers [9, 1, 9, 9, 36, 561] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
Find number abc
If bbcaa + 3c32c = 9747b 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 7406
NUMBERMANIA: Calculate the number 7406 using numbers [2, 8, 4, 4, 82, 845] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
MAGIC SQUARE: Calculate A+B*C
The aim is to place the some numbers from the list (12, 13, 14, 18, 19, 22, 27, 57, 58, 66) 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
