Daily Brain Teasers for Tuesday, 30 September 2025
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
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 334
NUMBERMANIA: Calculate the number 334 using numbers [6, 4, 2, 4, 52, 926] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
Find number abc
If 81ac8 + 86a21 = 16ba59 find number abc. Multiple solutions may exist.
#brainteasers #math
Ethical Problem
An attorney had just finished a consultation with an elderly, nearly blind widow, for which he charged her $100. The widow opened her purse and removed a $100 bill. When the lawyer accepted it, he noticed there was another 100 stuck to it. Immediately the lawyers keen legal mind realized he was faced with a vital ethical question:
Should he tell his partner?
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
Ross Granville HarrisonDied 30 Sep 1959 at age 89 (born 13 Jan 1870).American zoologist who developed the first successful animal-tissue cultures and pioneered organ transplantation techniques. In an early experiment, using tissue grafting techniques, he joined parts of embryos from differently coloured frogs to observe the movement of cells during the subsequent development of the embryos produced in this way. In another experiment, he took tissue from an amphibian embryo that would have formed a left limb, inverted and transferred it to the embryo's right side, where it formed a right limb. He discovered the hanging-drop culture method (1907), a new method of studying cells, by which he kept fragments of living tissue alive in suitable media and watch them multiply. Using this technique, he settled a controversy about the embryonic origins of nerve fibres. The hanging-drop method has also been valuable in oncology, genetics, virology and other fields. |
Calculate the number 319
NUMBERMANIA: Calculate the number 319 using numbers [6, 8, 3, 9, 44, 858] 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 (2, 3, 4, 25, 26, 27, 42, 43, 44) 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 56b5c - baba5 = 26a54 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 7562
NUMBERMANIA: Calculate the number 7562 using numbers [7, 8, 5, 4, 15, 954] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
Find number abc
If a0a1a + b99ca = 140ba4 find number abc. Multiple solutions may exist.
#brainteasers #math
