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Cornerstone · Grades 3–5 Keystones #1 23 September 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄5

    Answer: 19⁄20
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 17

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 15cm

    Answer: 16.16cm
  4. 4. Ratio Sharing in a ratio

    Divide 119 in the ratio 1:3:3

    Answer: 17, 51 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 12, 27, 34, 30, 22, 34

    Answer: 26.5

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