Daily Logic Puzzle: Helibrain Daily

1. Fill the grid. Put the numbers 1 to 5 (up to 7 later in the week) into the squares. Each number goes once in every row and every column.
2. Follow the signs. A sign between two squares must hold: in 4 > 2 the open side faces the bigger number. Between rows, ∨ means the top square is bigger and ∧ means the bottom one is.
3. Start from what is certain. A square next to a "smaller than" sign can't hold the biggest number; a row with only one place left for a number gets it there. The puzzle always has exactly one solution, and you never need to guess.

Tap a square, then a number, or use the keyboard (digits, arrow keys, Backspace). Turn on Notes to jot down the numbers a square could still be. A red square or sign means a rule is broken right now.

When the grid is full and breaks no rule, it's solved. You see your time, the number of mistakes (an entry that broke a rule when you made it) and how many people solved today's puzzle, with the median time once at least 5 have.

The share line looks like this: Helibrain Daily #12 · 2:41 · 🟩🟩🟨🟩🟩. Each square is one row of the grid: green without mistakes, yellow with one, orange with more. It shows how you did without giving away a single number.

Honestly: we don't know, and nobody has shown it. In 19,078 adults aged 50 to 93, people who did number puzzles more often scored better on memory, attention and reasoning tests [1]. That kind of study can't tell whether puzzles sharpen the mind or whether sharp minds enjoy puzzles. A large review of brain-training studies found that practice makes people better at the practised task, with little evidence that it carries over to other tasks or to everyday life [2].

So play Helibrain Daily because it's fun and a good daily habit of focus, not as a treatment. It isn't a test of intelligence, and your time says nothing about your health.