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Cornerstone · Grades 3–5 Keystones #1 8 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 5⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x + 6 = 42

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 2:3

    Answer: 36 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 45, 10, 30, 50, 46, 39

    Answer: 36.7

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