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

Five GCSE retrieval questions · 5 December 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄12 + 4⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 47

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 15, 46, 12, 15, 31, 35, 30

    Answer: 26.3

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