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Cornerstone · Grades 3–5 Keystones #1 17 January 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 17 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 1⁄10

    Answer: 3⁄10
  2. 2. Algebra Two-step equations

    Solve: 2x + 11 = 17

    Answer: x = 3
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 280 in the ratio 4:3:3

    Answer: 112, 84 and 84
  5. 5. Statistics Mean

    Find the mean of: 9, 5, 3

    Answer: 5.6666666666667

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