The honest answer is that it varies: a steady staircase takes a few seconds, a tangle of chained rules can take a minute. What matters is not the average but how you spend the difference between the two.
Work out your own budget
Take the time limit, divide by the number of questions, and you have an average per question. The limit and question count for the JobCannon test are on its landing page, which always shows the current figures; this article does not hard-code them, because they can change.
That average is a budget, not a target. If five easy series take you ten seconds each, you have banked time for the hard one. If two hard ones eat a minute each, there will not be enough left for the rest.
A budget worked through
Suppose, purely as an illustration, that a paper allows nine minutes for twenty series. These are invented figures, not those of any real test. Nine minutes is 540 seconds, so the average is 27 seconds a question.
Say eight of the twenty are easy and you clear each in 10 seconds. That uses 80 seconds against an average share of 216, so you have banked 136. The other twelve now have 460 seconds between them. If four of those are hard and take 55 seconds each (220 seconds), the remaining eight can have 30 seconds each (240 seconds), and the total lands on exactly 540.
The point of the arithmetic is the shape, not the figures: the time you save on quick items is what pays for the slow ones, so wasting ten seconds on a series you already see is a real cost.
A three-pass rhythm
- Glance (a few seconds). Read the shape. If you see the rule at once, take it and move on.
- Work (a short, fixed burst). Write the gaps, try ratios, try a split. Decide beforehand how long that burst is.
- Park. If the burst is up and nothing fits, leave it and carry on. Come back with what time remains.
The rule of thumb is that nothing should cost more than about twice your average. This is a working guide, not a measured benchmark; adjust it to your own practice results.
Why parking works
Staring longer at a series that has not yielded rarely helps; a fresh look often does. Coming back after other items can reveal the move you missed, such as a split into two lists or a sum of earlier terms.
Parking also protects the easy items, which are worth the same as the hard ones. A test where every question counts equally rewards collecting the quick ones first.
Guessing
Check the scoring before you decide. On the JobCannon Number Series test a wrong answer simply scores zero and nothing is subtracted, so an answer is never worse than a blank. Employer tests differ and some deduct for wrong answers; the instructions on the day are what count.
Practise pace without wrecking accuracy
- Do a short set untimed first, and write the rule next to each answer. That builds recognition.
- Then repeat under a timer, using the budget above, and note which kinds of rule cost you the most.
- Fix the slowest kind, not the whole set. If two-series items are the slow ones, drill splitting. If growing gaps are slow, drill the gap row.
- Keep a running log of how many you parked and how many you recovered. The recovery rate tells you whether parking is working.
The JobCannon Number Series test breaks your result down by kind of rule, which makes the slowest kind easy to find. The number series practice page has further series of each type. For broader time management on numeric papers with tables and charts, the JobCannon Numerical Reasoning test is the better fit.