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Cornerstone · Grades 3–5 Keystones #1 27 October 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄10 + 1⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 98

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 4cm

    Answer: 8.06cm
  4. 4. Ratio Sharing in a ratio

    Divide 125 in the ratio 1:1:3

    Answer: 25, 25 and 75
  5. 5. Statistics Mean

    Calculate the mean of: 14, 46, 45, 46, 34, 46, 5

    Answer: 33.7

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