ENAC Marble Tubes
IntellectualPSY0Two boards of three tubes hold the same numbered marbles. Count the fewest moves that turn the top board into the bottom one, then click that number. A move takes the top marble of a tube and puts it on top of another tube. The tubes hold 3, 2 and 3 marbles. The exam format is 10 boards with 20 seconds each.
Overview
The fewest moves is the same whether you count from the top board or the bottom one. So if you lose the thread one way, start again from the other end. On the long boards, two marbles near the bottom of their tubes usually have to change places. With only three free spaces, you have to park the marbles above them first, and each park counts as a move.
Assessments
Part of the Air France Cadets selection at ENAC (PSY0) battery as “Billes”.
Seventh in the stage. Two arrangements of the same numbered marbles in three tubes, one above the other, and one number for the answer: the fewest moves that turns the first into the second. Only the top marble of a tube moves, and a tube takes only so many. Ten boards, a clock on each, and a board is right or it is wrong.
Battery mappings are based on public information and may change.
Two boards, three tubes
- The top board is where the marbles start, and the bottom board is where they have to end up.
- A move takes the marble at the top of a tube and puts it on top of another tube.
- The tubes hold 3, 2 and 3 marbles, left to right. A full tube won’t take any more.
How many moves?
Count the fewest moves from the top board to the bottom one, then click the number.
Game Phases
Find What Must Move
In each tube, find the lowest marble that isn't where the bottom board has it. That marble and everything above it has to move at least once.
Send Marbles Straight Home
A marble can go straight to its place when the tube it belongs in has room and everything under its place is already right. Each one that can costs you one move.
Count the Parks
A marble that can't go straight home has to park somewhere else first and move again later. Each of those detours adds a move.
Check, Then Click
A click answers straight away and can't be taken back. So run through your moves once more first.
More Practice
Multitasking & Planning
8 exercisesMultitasking Test
Two tasks at once: scan number grids for duplicate pairs while answering spoken questions from your phonebook, agenda, mental math and word categories — some of which must be answered at an exact moment on the clock.
Planning Test
Build a weekly schedule that satisfies every constraint. Pick a scenario, fill the grid with role assignments, and meet every staffing rule before the timer runs out.
Triple Multitasking Test
Verify chained equations, spot duplicate icons, and keep your aircraft in the gap as hazard lines fall. Three tasks, one screen, one five-minute clock.
Motion Challenge
A ball maze planning test in the style of Aon's motionChallenge: slide the blocks clear and steer the orange ball into the black hole in as few moves as you can. Six minutes on the clock, as many puzzles as you can solve, one level up after every solve.
M-TASK Multitasking Test
Three tasks at once in the Schuhfried M-TASK format: work a symbol queue in its stated priority order, fill arithmetic blanks against a time bar, and reorder symbol rows to match a target. One clock, a neglected panel drags the whole score, and every run records a replay. Or go endless in Challenge, where the first mistake ends the run.
Task Manager
Enter new autopilot values quickly and accurately while cancelling red alerts within three seconds — the COMPASS-style two-task screen, on one shared keyboard.
ENAC Slid Shapes
Two 6 × 6 grids and a tray of pieces. Slide pieces onto your grid until it matches the figure beside it. A light cell of a piece flips the square under it and a dark cell changes nothing, so two light cells on one square cancel out. The exam format is 5 boards with 3 minutes each.
ENAC Airspace Conflict Watch
Aircraft cross two bands of six airways, blue ones from right to left and violet ones from left to right. Each band has a grey zone that can never hold more than 4 aircraft, or more than 2 blue ones. You close airways to keep both zones within their limits, and you divert as few aircraft as you can. The exam format is 10 boards in a row.