Extensive experimental evidence suggests that the fun level of this kind of puzzle increases exponentially with the number of horizontal possibilities, so I have devised this new version which emphasizes sideways movement. Using only a sequence of transpositions, see if you can take this: t...

Date and time is formatted as "hh:mm:ss DD:MM:YY", where hh is a 24 hour clock, mm are minutes, ss are seconds, DD are days, MM are months and YY are the last two digits of the year. All terms can have leading zeroes. A palindrome date and time is one that reads the same forwards and backwards. W...

I may not be the head But strong to the bone I bear the load of my company Yet I’m rarely found alone Who am I?

(This is the first in a series of puzzles written for Timwi for a Secret Santa puzzle exchange, themed around various custom modules for the game Keep Talking and Nobody Explodes. No KTaNE knowledge is necessary for any of these puzzles except the final meta; each puzzle resolves to a single wor...

The following galaxy-like shape: can be folded onto the surface of a cube in a way that perfectly covers the entire cube with no gaps and no overlaps. How can it be done?

I was thinking about creating some riddle for TED-ED and somehow I came up some math riddle something like that: "A group of seven creatures weights together 1000 kg, the largest one and second smallest one weights same as smallest one and second largest one, 3 largest ones weights same as 4 sma...

As noun, my foes find me traumatic (Balls! they say - quite cinematic). As verb, my use ain't systematic; but phrasal, my limbs go erratic.

I am in darkness, I’m not in the shadow, What am I? I’m trying to figure it out please help! cri Who knows—

Here is the scenario. The other day I watched two excellent well informed teams playing Codenames. Amazingly the first team got six out of nine in their first attempt! The three words remaining for them were Mud Fact Deep The assassin was: Bulb The other team was faced with...