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Three skills every screening test checks.

Train one in the next ten minutes.

01 · Mental mathWarm-up · 1 of 1

18% of $450K81K

$12M → $16M, 3 yrs10%

Type the answer and press Enter. Graded here, nothing to sign up for.

Timed, graded the moment you answer, with the worked method after every question. Free to play; your results stay on this device until you make an account.

Start a 10-question math sprint or pick one of 10 skills

500 math questions · percentages, growth, CAGR, break-even, margins

  1. 02Market sizing

    Build the driver tree, land the number

    Lay out the drivers, watch them multiply through, then see your estimate on the reference range next to the model build.

    1 market, one clock · 32 markets

    Size a market Choose one
  2. 03Chart reading

    Read the exhibit, answer fast

    A consulting-style chart with a few questions: pull the value, compute the growth, find the driver.

    1 exhibit, a few questions · 50 exhibits

    Read an exhibit Browse charts
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