daily IT puzzle · made for senior engineers
The tech behind everyday life.
One real-world story. One IT concept hidden inside it. Three minutes a day. Decodory is the quiet competence-flex you bring to standup.
3 min/day streak-based server-scored
sample puzzle
At a Mumbai airport, the ground crew unloaded Plane B's bags first…
Plane A took off but Plane B's bags went into the same cargo container — on top. When B was ready, the crew had to dig out the older bags. A 30-minute delay followed.
Queue (FIFO)
Stack (LIFO)
Hash map
Linked list
Stack (LIFO) · data goes in, last in comes out first. That's the bag pile.
how it works
Three minutes. Three steps. Zero jargon in the story.
01
Read a real story
Set in a chai stall, hospital ER, Swiggy hub, bank. Specific. Indian. No tech words.
02
Spot the concept
Pick the IT concept hiding inside, or solve the puzzle under real constraints.
03
Get the reveal
Two sentences explain why your pick worked — or what the trap was.
The daily IT habit that sticks.
Free forever. No mascot. No ads. Just one good puzzle a day.