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Spaced repetition: each system comes back just before you would forget it. Fast, correct answers stretch the interval; a miss brings it back the same day.
Free practice: ZigzagScore 0/0
Zigzag
Aim = (3 × Difference) − 9 · If the difference is counted in units: Aim = (3 × Units) / 10 − 9
Your ball:White(cue ball · 1)
Other balls:YellowRed
Expected shot:ZigzagMixedCushion orderLong → Long → Long
Given:
Difference (units; 1 diamond = 10 units)20
In this position, what is Aim?
Task: put the given values into the system's formula and calculate Aim. Enter the answer as the number read on the table's Aim scale.