Count the Moving Objects
White balls bounce around inside a black circle. Work out how many there are and pick that number from the row of buttons — as quickly and accurately as you can, for as many rounds as the clock allows.
Each round the balls drift into place and pause for about a second, then start moving.
Five close numbers are offered, e.g. 9 10 11 12 13.
How this practice works
- Adaptive: a right answer makes the next round harder (more balls, faster); a wrong one makes it easier. There are 12 levels.
- You are told straight away whether each answer was right.
- Practice first: 3 slowed rounds, untimed, with the balls numbered afterwards so you can check.
- Then the timed run: 60 seconds. The clock keeps running while you look, so don't get stuck on one round.
- If you switch tabs the clock stops and that round is discarded.
Controls
Tap or click the number. On a keyboard, keys 1–5 choose the buttons from left to right (the small grey number on each button).
About this practice
Monitoring practice: count balls bouncing inside a circle, with close answer options, instant feedback and difficulty that adapts. NATS doesn't publish the names or formats of its Stage 1 tests, so this is independent practice for keeping track of moving objects, not a copy of any real test.
Independent practice site, not affiliated with or endorsed by NATS, Aon, EUROCONTROL or the CAA. Our questions are original, written to practise the abilities these assessments cover — they are not the real tests. FEAST is a trademark of EUROCONTROL.
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