ENAC Calculation Grids
IntellectualPSY0A board of 9 complete calculations, three by three. Some of them are false. Click the false ones, then validate before the bar runs out. A board holds anywhere from none to 4 false ones. The exam format is 8 boards with 40 seconds each.
Overview
Most false ones give themselves away before you work anything out. A negative on one side and a positive on the other, a result ten times too big, an odd number from an even product: each of those takes a glance. Then check the last digit of each side. But don't stop when it matches, because a result that's ten out still ends in the right digit, so work those through. Mark a false one as soon as you find it, so you don't work it out twice. Once you've found four, the rest are right. And a board with nothing false is normal, so don't go hunting for a mistake that isn't there.
Assessments
Part of the Air France Cadets selection at ENAC (PSY0) battery as “Grilles de calculs”.
Eight boards of about nine complete calculations, ninth of the stage, marked whole: the ones you mark must be exactly the ones that are wrong. The arithmetic is far simpler than any preparation material suggests, boards with nothing wrong on them are common, and the board shows a draining bar with no number on it.
Battery mappings are based on public information and may change.
One board, nine calculations
- Every calculation is complete, both sides given. Some of them are false.
- Click the false ones to mark them ✗, then validate. A board has anywhere from none to 4 false ones.
- × comes before + and −, so 103 − 7 × 9 = 40 is right.
Which ones are false?
Mark the ones you think are false, then show the answers.
Game Phases
Glance First
Wrong sign, a zero too many, an odd answer to an even product: spot those before you calculate anything.
Then the Last Digit
Work out just the last digit of each side. If they differ, it's false.
Finish the Close Ones
When the last digits match, the tens can still be out. Work those through to the end.
Mark, Then Validate
Mark each false one as you find it, and validate every board before the bar runs out, even one with nothing marked. A board you haven't validated scores nothing.
More Practice
Mental Math
14 exercisesMath: Full
A mixed practice test combining all math categories — integers, decimals, fractions, time, weight, operators, and percentages — with a per-question timer.
Math: Decimals
Solve decimal arithmetic problems — addition, subtraction, multiplication and division with decimal numbers.
Math: Fractions
Solve fraction arithmetic problems — addition, subtraction, multiplication and division of fractions.
Math: Integers
Solve integer arithmetic problems — addition, subtraction, multiplication, and division.
Math: Operators
Find the two operators that make the fraction equal the target value.
Math: Percentages
Solve percentage problems — find the percentage or the whole number given the other two values.
Math: Time
Add or subtract two times expressed in hours, minutes, and seconds.
Math: Weight
Add or subtract two weights expressed in kilograms and grams.
Equation Completion
Fill each equation's gaps with digit tiles 1 to 9, each usable once, so the given result is correct. The faithful cut-e (Aon scales eql) digit entry format, plus our multiple choice practice variant.
Data Interpretation
Read data from a chart or table — bar, line, pie or table — and answer a numerical question or judge a statement True, False or Cannot Say, one item at a time against the clock. Play with a single chart per question, or the cut-e-realistic tabbed workbook where finding the right dataset is part of the task.
Speed, Distance & Time
Solve speed–distance–time word problems in an aviation setting — ground speed, distance to run, ETA and fuel burn — applying distance = speed × time to find the missing variable, mentally and against the clock.
Audio Math Test
Mental arithmetic you hear instead of read: each question is narrated once in your headphones, and the answer clock only starts when the voice stops.
ENAC Mental Calculation
Four series of ten boards, back to back, each on its own clock. You type the result of a chain of additions and subtractions, type the value of the last letter in a small system, choose the narrowest of 10 intervals that holds a result, then tick every one of 7 intervals that does. On the ENAC EPL form, every chain in the first series ends on a multiplication and each series gets 4 minutes. On the Air France Cadets form, the first series is sums only and each series gets 6 minutes.
ENAC Mathématiques
Thirty word problems on percentages, speeds, work rates, shapes and clocks, with a pen and paper but no calculator. You type most answers as a number and pick a few from five. The exam format is 30 problems in 35 minutes.