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Cornerstone · Grades 3–5 Keystones #1 11 May 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 May 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄8

    Answer: 19⁄28
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 27

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 6cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 18 in the ratio 1:2

    Answer: 6 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 10, 42, 18, 32, 11, 45, 11, 5

    Answer: 21.8

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