Free drill: Number sequences drill

10 questions · 5 minutes

Ten “what comes next” sequences in five minutes, from simple gaps to interleaved and multi-step rules. Answer as many as you can before time runs out; every question has a worked answer in the review.

Line drawing of a row of square tiles holding growing groups of dots, with an empty tile at the end and a pencil beside them

Before you start

Questions come one at a time and you cannot go back. Choosing an option (or pressing Enter on a typed answer) moves straight to the next question; keys 1 to 4 also choose an option.
The clock keeps running in background tabs and reloads. When it runs out, unanswered questions score nothing.
Work without a calculator. Optiver states that calculators are not permitted in its assessment.

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