Before you start

• There are 24 puzzles and you have 20 minutes. The clock keeps running once you start.
• The puzzles start easy and get harder. Four kinds take turns: grids, number series, picture sequences and odd-one-out.
• Tap an answer and the next puzzle appears. You can go back, skip a puzzle and return to it later.
• Your score appears on screen at the end. No email, no sign-up.

Find a quiet place and use a screen big enough to see the drawings clearly.