Daily Brain Teasers for Sunday, 21 December 2025
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Find number abc
If 76a67 - b5a62 = c1aa5 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 5172
NUMBERMANIA: Calculate the number 5172 using numbers [1, 6, 4, 2, 45, 816] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
A little boy sits on Santa's
A little boy sits on Santa's lap.
Santa says, "I bet I know what you want for Christmas," and with his finger he taps the boys nose with every letter he spells "T-O-Y-S."
The little boy thinks a second and says, "No, I have enough toys."
Santa replies once again tapping the boys nose with every letter, "C-A-N-D-Y."
Again the little boy thinks a second and says, "No, I have all kinds of candy."
"Well what would you like for Christmas?" Santa asks.
The little boy replies, tapping Santa on the nose, "P-U-S-S-Y, and don't tell me you don't have any because I can smell it on your finger!"
Santa says, "I bet I know what you want for Christmas," and with his finger he taps the boys nose with every letter he spells "T-O-Y-S."
The little boy thinks a second and says, "No, I have enough toys."
Santa replies once again tapping the boys nose with every letter, "C-A-N-D-Y."
Again the little boy thinks a second and says, "No, I have all kinds of candy."
"Well what would you like for Christmas?" Santa asks.
The little boy replies, tapping Santa on the nose, "P-U-S-S-Y, and don't tell me you don't have any because I can smell it on your finger!"
MAGIC SQUARE: Calculate A-B-C
The aim is to place the some numbers from the list (5, 6, 8, 20, 21, 23, 24, 65, 66, 68, 97) 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
Robert BrownBorn 21 Dec 1773; died 10 Jun 1858 at age 84. Scottish botanist who was an outsatanding authority on plant physiology in his day. He improved the natural classification of plants by establishing and defining new families and genera, but is best known for being the first to notice the natural continuous movement of minute particles in colloidal solution (1828), since known as Brownian movement. Later scientists recognized that this gives direct evidence of molecular motion in liquids, and links to the kinetic theory of gases. Brown distinquished (1826) between what became known as the conifers (gymnosperms) and the flowering plants (angiosperms). In living cells he recognized a structure for which he coined the name nucleus (Latin: "little nut").« |
Find number abc
If 1bcca + 4bba5 = cb587 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 3828
NUMBERMANIA: Calculate the number 3828 using numbers [3, 1, 3, 8, 90, 336] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
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
