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Cornerstone · Grades 3–5 Keystones #1 30 July 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 30 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 1⁄6

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 7x + 7 = 70

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 2:1:1

    Answer: 40, 20 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 9, 47, 15, 38, 17, 34

    Answer: 26.7

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