How sharp are you today?

Five quick challenges

1. Reaction Time

   Wait for the panel to turn yellow, then tap. Three rounds. Tap early and the round restarts.

   Scored on your median time in milliseconds, minus a few points per false start.

2. Visual Memory

   Five tiles light up on a four-by-four grid for a moment. Tap the ones you saw.

   Scored on how many of the five you found.

3. Number Memory

   A six-digit number appears, then disappears. Type it back.

   Scored on how many digits are right and in the right place.

4. Quick Math

   One simple sum, subtraction or times table. Type the answer.

   Right answers score more the faster you give them. A wrong answer scores zero.

5. Color Match

   A color word appears in a different ink. Tap the color of the ink, not the word. Six rounds.

   Scored on correct taps, with a small bonus for speed.