Start a test

Choose a set

• Each set has 5 problems with choices A–E, one problem per screen. Tap the circled letter of your answer. Use Prev / Next or the number buttons to move.
• 1st try: 1 min – 3 min per problem (5 min – 15 min). You can't submit before the minimum time, and your answers are submitted automatically when time runs out.
• After the 1st try you only see your score, not which problems are wrong.
• 2nd try: every problem gets a hint, but you are not told which ones were wrong. Your 1st-try answers stay, so change any you want. Time: 1 min 30 sec to look over everything, plus 2 min – 2 min 30 sec for each problem you missed on the 1st try (for example, 2 missed = 5 min 30 sec – 6 min 30 sec).
• 4 or more correct = PASS. 5 correct = PERFECT. After the set you see your wrong problems and their solutions.
• You can pick any set, in any order.

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