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Cornerstone · Grades 3–5 Keystones #1 20 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 1⁄5

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 2x + 3 = 21

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 182 in the ratio 2:2:3

    Answer: 52, 52 and 78
  5. 5. Statistics Mean

    Calculate the mean of: 50, 9, 36, 35, 35, 30, 39, 27

    Answer: 32.6

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