Daily Brain Teasers for Sunday, 20 September 2026
|
puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Find number abc
If c02b0 + 555ac = b5a4c find number abc. Multiple solutions may exist.
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.
Calculate the number 4343
NUMBERMANIA: Calculate the number 4343 using numbers [4, 9, 4, 4, 52, 535] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Drinking buddies
A couple of drinking buddies who are airplane mechanics are in a hangar at JFK New York. It's fogged in and they have nothing to do.
One of them says to the other, "Man, have you got anything to drink?"
The other one says, "Nah, but I hear you can drink jet fuel, and it will kinda give you a buzz."
So they do drink it, get smashed and have a great time, like only drinking buddies can.
The following morning, one of the men wakes up and he just knows his head will explode if he gets up, but it doesn't. He gets up and feels good. In fact, he feels great! No hangover!
The phone rings. It's his buddy. The buddy says, "Hey, how do you feel?"
"Great", he said! "Just great"! The buddy says, "Yeah, I feel great too, and no hangover. That jet fuel stuff is great. We should do this more often!
"Yeah, we could, but there's just one thing . . . "
"What's that?"
"Did you fart yet?"
"No . . . "
"Well, DON'T, 'cause I'm in Phoenix."
MAGIC SQUARE: Calculate A*B+C
The aim is to place the some numbers from the list (9, 10, 14, 15, 16, 21, 29, 62, 63, 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.
DNAIn 1952, Alfred Hershey and Martha Chase published a report confirming DNA holds hereditary data. Their experiment used the T2 bacteriophage, which, like other viruses, is just a crystal of DNA and protein. It can reproduce when inside a bacterium such as E. coli. When the new T2 viruses are ready to leave the host E. coli cell (and go infect others), they burst the E. coli cell open, killing it (hence the name "bacteriophage"). Hershey and Chase were seeking an answer to the question, "Is it the viral DNA or viral protein coat (capsid) that is the viral genetic code material which gets injected into the E. coli?" Their results indicated that the viral DNA, not the protein, is its genetic code material. |
Find number abc
If 89bc0 - ca10b = bba2b find number abc. Multiple solutions may exist.
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.
Calculate the number 670
NUMBERMANIA: Calculate the number 670 using numbers [3, 2, 3, 3, 55, 560] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If 8b3ba - aca1b = 106c2 find number abc. Multiple solutions may exist.
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.
Calculate the number 806
NUMBERMANIA: Calculate the number 806 using numbers [3, 3, 2, 9, 81, 720] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
