This is an Easy as LITS puzzle (LITS variation), where you shade cells to form tetrominoes Rules taken from Grandmaster Puzzles: Shade exactly four connected cells in each outlined region, to form an L, I, T, or S tetromino. All shaded cells are connected with each other. No 2×2 group of cells c...

Can you continue this sequence? If you can get the next few numbers in the sequence, you can just about as easily double the length of the sequence: 3 3 5 4 4 3 5 5 4 3 6 6 8 8 7 7 9 8 8 6 9 ... Please, if you've come across this one before, consider not posting a spoiler right away.

To properly complete this image, what color should the central S be?

There was a town, full of people. But that town was not very simple. Only 15 people, and they march outside. Day goes and night comes, and they go inside. Each day you vote, and you go on trial. If you are wrong, you get hanged, which ends your survival. If you are virtuous to others, you sho...

There are two fruits, each with 6 letters in the name. Both fruits use letters exclusively from a set of 7 letters. ⁃The name of one of the fruits uses 6 out of the 7 letters, using each of the 6 letters distinctly once. ⁃The name of the other fruit uses only 3 of the 7 letters (but repeats most ...

Find the two words. These words refer to 2 common structures you might find on a property. Structure 1 uses 4 out of the 6 letters, using each of those 4 letters distinctly once. Structure 2 also uses 4 out of the 6 letters, but repeats half of those letters exactly once. hint:

One bright Monday morning, I drove to work and parked my car in Lot A. That morning, others also parked in Lot A, and we all found each other’s parking jobs to be satisfactory. That afternoon, a co-worker, who was a nervous driver, and who was my neighbor at home, asked me to ride with her to pro...

Piper’s boyfriend Rico proposed to her, so Piper asked her a Math question, and if Rico can answer it correctly, Piper will accept the proposal. Piper said, “I bought a cuboid with volume 8 yesterday at the store. When the length, width, height of the cuboid are increased by 1 to form a new cubo...

Tadaa! Here comes Mathematics again! Here I am giving you some clues and some sentences. The answer is the Sum of the sub-answers of all three clues. All the sub-answers are numbers. Hint 1 READ EVERTHING CAREFULLY Clue 1 Of course the last one was not a clue. Didn't you read the second sentence?...

My prefix is a german no, My suffix is the age last years, My infix is the cage of a hunter, My whole is coming once again in a few weeks.

This problem was already posted with much more details on MathOverflow (there), but it can be stated so shortly and easily, and it is so puzzling, that it definitely deserves to be posted here too. Let $u_0 \ge 2$ be a rational number, and $u_{n+1} = \lfloor u_n \rfloor(u_n - \lfloor u_n \rfloo...

I've recently registered on this site, so I would like to try posting a riddle. A simple one, with no story. Can you crack this? I just encrypted the message TG92ZXIgSjVMR0s0UkFLSkxUSzIzQ0k1TEhVWTNYSFU2UT09PT0= Target of this crack is to get 1 word. You need to know some bases if you want to de...

Do you want to travel in 16 years to top 7 island in USA? <3. Cost for the ticket to the island(in 16 y.o.) - 953$. For sure: ...and:

In chess, the white player makes the first move.It is generally understood that this gives white a minor advantage, with a win rate of 52-56%. In this initial position, white actually has checkmate in one move!      However, the player who makes the first move doesn't necessarily have the advanta...