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Harver Number Sequences Practice with Worked Answers

Practise Harver-style numerical reasoning: 20 number series with next and missing numbers, an 8-minute clock and a step-by-step answer for each item.

Practice: 2 untimed practice items, then 20 items in 8 minutesAlso called “Harver numerical reasoning test”Also called “Harver number series test”

How the practice module works

  1. 01Each item shows a series of numbers with one number hidden: the next one, or one in the middle.
  2. 02Work out the rule and pick the hidden number from five options.
  3. 03Two practice items with worked answers come first. Then you have 8 minutes for 20 items.
  4. 04You cannot go back to an item, and items left when the clock runs out count as skipped.

Controls

  • Click or tap an option, then Next
  • Keys 1–5 choose an option, Enter confirms

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Subtest
Numerical Reasoning, also called Number Sequences: one of five cognitive subtests (Harver, official)
Task
Find the next or the missing number in a series (Harver, official)
Answer format
Multiple choice (Harver, official)
Timing
Timed: 5–15 minutes per subtest on one Harver page, 6–24 on another (official); item counts are not public
Practice questions
Practice questions come before each subtest (Harver, official)
Scoring
Norm-referenced from 0 to 100%, where 50% is average, based on the number correct (Harver employer help centre)
Practice version
Candidate Falcon’s choice: 2 untimed practice items, then 20 items in 8 minutes, 12 kinds of rule

What the Harver Number Sequences test looks at

Harver’s cognitive ability test has five subtests, and the employer chooses which ones you take. Numerical Reasoning, which Harver also calls Number Sequences, shows a series of numbers and asks for the next number or a missing one. It tests whether you can spot the rule behind numbers quickly, not long calculations.

Harver keeps its cognitive tests light on language, so each item is the series and the options. Harver does not publish its rules or item counts, so this practice covers the patterns number-series tests commonly use: adding or multiplying by a fixed number, steps that grow, two operations or two series taking turns, squares and cubes, sums of the two previous numbers, and differences of differences.

The subtest is timed. Harver gives 5 to 15 minutes per subtest on one page and about 6 to 24 minutes per section on another, and says practice questions come first. Harver’s employer help centre describes the result as norm-referenced from 0 to 100%, with 50% as the average, based on the number of correct answers.

How the Number Sequences practice works

  1. Read the series. The hidden number is shown as a question mark, at the end or in the middle.
  2. Work out the rule, then choose one of five options by click, tap or keys 1 to 5, and confirm with Next or Enter.
  3. Two practice items come first, untimed, each with a worked answer.
  4. The timed part has 20 items and an 8-minute clock. You cannot go back to an item.
  5. At the end you see your practice score, accuracy, median time, results by kind of rule and a step-by-step answer for every item.

Number Sequences tips

  • Write down the differences between neighbouring numbers first: most rules show up there.
  • If the differences are not constant, take the differences of the differences, or check whether they double.
  • If the numbers grow fast, try ratios: ×2, ×3, or ×2 then +1.
  • If the series zigzags, look at every other number: two series may be taking turns.
  • For a missing number, check your answer against the number after the gap as well as the one before.
  • Spend at most about 30 seconds on an item, then make your best pick and move on.

Common Number Sequences mistakes

  • Repeating the last difference when the differences are growing.
  • Continuing the neighbouring series in an alternating pattern instead of the one two places back.
  • Forgetting the second operation in a rule such as ×2 then +1.
  • Checking a missing number only against the number before the gap.
  • Spending minutes on one hard series and leaving easy items unanswered at the end.

A short Number Sequences practice routine

  1. Do one run here and note which kinds of rule cost you the most.
  2. Read the step-by-step answer for every item you got wrong or skipped.
  3. Practise the habit of writing differences, then ratios, then every other number.
  4. Do another run aiming to answer all 20 items in the 8 minutes.
  5. Before the real test, read your invitation: the employer chooses which subtests you take.

Number Sequences FAQ

What is the Harver numerical reasoning test?

It is the Numerical Reasoning subtest of Harver’s cognitive ability test, also called Number Sequences. Harver says you find the next or the missing number in a series. It is one of five subtests, and the employer chooses which ones you take.

What kind of number series questions does Harver use?

Harver does not publish its rules. This practice covers common number-series patterns: fixed steps, growing or doubling steps, multiplying, two operations or two series taking turns, squares and cubes, sums of the two previous numbers, and differences of differences.

How long is the Harver number sequences test?

Harver says each subtest is timed and gives 5 to 15 minutes per subtest on one page and about 6 to 24 minutes on another. It does not publish the number of items. Candidate Falcon’s practice gives you 8 minutes for 20 items.

Can I use a calculator?

Harver’s public pages do not say. The numbers in this practice stay at four digits or fewer and the rules use simple arithmetic, so you can work them out in your head or on paper.

Is this the real Harver test?

No. It is independent practice by Candidate Falcon, with generated series. It is not affiliated with Harver and does not use its items or scoring. The practice score is the number correct, not a Harver percentage.

Independent practice by Candidate Falcon, based on Harver’s public product pages and help centre. Not affiliated with Harver, and not its scoring. The questions and scenarios are original, and practice results are not Harver scores. For how each Harver module works, timing and results, read the free Harver assessment guide.