ENAC M2-back numérique
IntellectualPSY0Digits come up one at a time, a new one every 3 seconds. From the third one on, you say for each digit whether it's the same as the one 2 before it. The exam format is 62 digits, 60 of them with a question.
Overview
Each comparison is easy. Keeping it up for 62 digits is the test. Hold the last two digits and say them to yourself as a pair. When a new digit comes, compare it with the first of the pair, click, then drop that one and add the new digit to the end. So with 0 9 in your head and a 5 on screen: No, and now it's 9 5. Then a 9: Yes, and now it's 5 9. Or picture two boxes and fill them in turn: that works just as well. How fast you click is recorded too, so answer as soon as you're sure instead of waiting out the 3 seconds. The counter tells you nothing you can use, so leave it alone. If you lose the pair, don't try to rebuild it from memory. Click your best guess on the next two digits and hold those two: you're back in step on the one after.
Assessments
Part of the Air France Cadets selection at ENAC (PSY0) battery as “M2-back numérique”.
The stimulus changes between sittings: 62 digits in September 2026, 42 colours in September 2024 and 2025, and in September 2023 the same test three back, on 43 digits. This is the digit form, the one to train first; its 3-back mode covers the 2023 form.
Battery mappings are based on public information and may change.
Eight digits, two back
On the day these come one at a time, a new one every 3 seconds. The first two get no question. Each one after that does: is it the same as the digit two before it?
One digit at a time
The same eight digits, the way the test shows them. There’s no clock here, and each answer is corrected before the next digit.
Game Phases
Hold a Pair, Shift One
Keep the last two digits in your head. Compare each new digit with the first of them, then drop that one and add the new one.
Click on Every Digit
From the third digit on, each one needs a Yes or a No before the next comes, 3 seconds later. No click scores nothing.
Leave the Counter Alone
Glancing up to see how far you've got is how a pair gets dropped. Keep your eyes on the digit.
Lost It? Take the Next Two
Don't try to dig the old pair back up. Hold the next two digits as your new pair, and you're answering again on the one after.
More Practice
Memory
10 exercisesENAC M2-back couleurs
Coloured squares come up one at a time. From the third on, say whether each one is the same colour as the one two before it. The exam format is 42 colours, 40 answers, in 2:06.
ENAC Memory N-Back
Letters come up one at a time, and for each one you say whether it’s the same letter as the one three, four or five before it. Capitals and small letters count as the same. The exam format is two tests back to back: a 3-back then a 4-back for ENAC EPL, a 4-back then a 5-back for Air France Cadets. It hasn’t been set since 2020.
Visual N-Back
Shapes in colours go past one at a time. On every one, say whether it is the same shape AND the same colour as the one a few places back — and the lag you are matching against changes from block to block.
Associative Memory
Memorise a set of symbol–number pairs, then after a short delay recall which number went with each symbol.
Acoustic Memory Test
Hear a spoken sequence once, hold it through a filled delay, and type it back — exactly in order.
Parameter Memory Test
Aviation parameters flash up on a dark display, then vanish. Reproduce the data row by row, from memory, before the clock runs out.
Grid Challenge
A dot memory test in the format of gridChallenge, Aon's official name for its working memory module: dots flash one by one on a scattered field, quick yes or no puzzles interrupt between flashes, then you click the dots back in order.
ENAC Memory Calculation
You get a calculation, then a letter, then another calculation and another letter, and so on. At the end of the board, you type the letters back in the order they came. The exam format is 20 boards, from 3 letters up to 9, with 5 seconds a calculation and 1 second a letter.
ENAC Running Comparison
A stream of simple calculations, one at a time. For each one, tick whether its result is identical to or different from the one it's compared with: the result just before, the one two back, or a fixed value X, depending on the block. The exam format is 100 answers in four blocks of 25, about 12 minutes.
ENAC Reversed Series
Digits come up one at a time in the same spot, a second each. When they’ve gone, you type them back in reverse, the last one first. The sequences grow from 4 to 9 digits. The exam format is 12 sequences, about 3:30.