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

Five GCSE retrieval questions · 7 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 1⁄6

    Answer: 29⁄30
  2. 2. Algebra Two-step equations

    Solve: 3x + 3 = 33

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 14cm

    Answer: 14.56cm
  4. 4. Ratio Sharing in a ratio

    Divide 104 in the ratio 2:1:1

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

    Find the mean of: 12, 10, 6, 18, 7

    Answer: 10.6

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