A little sharper, one question at a time.

How a practice question works

• Every question is generated from a seed rather than drawn from a fixed bank, so the supply does not run out and you never see a repeat you did not ask for.
• Pick a difficulty (low, medium, high) or leave it on random. Latin Square difficulty is guided by the solver’s connected deduction chain. The levels are independent practice bands.
• A stopwatch runs while you work and turns amber past the 75-second exam pace, so you train the rhythm as well as the patterns.
• After you answer, a worked solution explains the reasoning, not just which option was right.
• Every attempt is recorded, so your dashboard can show accuracy and median time per task type and difficulty.

Practice needs a free account, because the attempts have to be stored somewhere to be worth recording. The free plan includes generated questions up to a daily limit, with no ads.

Read the rules first

Each task type has a page with the full instructions, the constraints every valid question satisfies, and worked examples. No account needed for those.

• Figure Sequences rules
• Mathematical Equations rules
• Latin Squares rules