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Cornerstone · Grades 3–5 Keystones #1 4 February 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 February 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 5⁄7

    Answer: 27⁄28
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 85

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 7cm

    Answer: 8.6cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 1:4

    Answer: 7 and 28
  5. 5. Statistics Mean

    Find the mean of: 7, 3, 14, 12, 20

    Answer: 11.2

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