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Cornerstone · Grades 3–5 Keystones #1 21 October 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 October 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 2⁄3

    Answer: 26⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x - 6 = 36

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

    Calculate the hypotenuse when a = 12cm and b = 4cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 100 in the ratio 2:2:1

    Answer: 40, 40 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 38, 43, 28, 44, 17, 15, 44, 20

    Answer: 31.1

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