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Cornerstone · Grades 3–5 Keystones #1 20 November 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 20 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄8

    Answer: 29⁄40
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 36

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 14cm

    Answer: 15.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 105 in the ratio 2:1:4

    Answer: 30, 15 and 60
  5. 5. Statistics Mean

    Find the mean of: 11, 13, 3, 9, 20

    Answer: 11.2

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