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Cornerstone · Grades 3–5 Keystones #1 16 September 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 16 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 1⁄5

    Answer: 13⁄40
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 22

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 13cm

    Answer: 13.93cm
  4. 4. Ratio Sharing in a ratio

    Divide 300 in the ratio 2:1:2

    Answer: 120, 60 and 120
  5. 5. Statistics Mean

    Find the mean of: 15, 16, 18

    Answer: 16.333333333333

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