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Cornerstone · Grades 3–5 Keystones #1 7 September 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 September 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 2⁄5

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x + 7 = 28

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 5cm

    Answer: 7.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 130 in the ratio 2:1:2

    Answer: 52, 26 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 12, 12, 30, 45, 37, 13

    Answer: 24.8

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