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Drill

Ratio Detective

Eight cases. In some you work out a ratio from a few figures, in others you find what moved it. The traps are the usual exam slips.

How to play

  1. 1.Eight cases, each from a different template, with new figures every time.
  2. 2.Use paper or a calculator: there is no clock to race, but the run must end within 10 minutes.
  3. 3.Right: 10 points × the multiplier (it grows every 3 right in a row, up to ×4).
  4. 4.After the run, every mistake is explained with the formula.

Keyboard: 1–4 pick an answer, Enter starts and moves on.

Draft: a teacher is still reviewing these items.