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Cornerstone · Grades 3–5 Keystones #1 27 January 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 January 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 1⁄4

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

    Solve: 5x - 18 = 12

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 14cm

    Answer: 17.2cm
  4. 4. Ratio Sharing in a ratio

    Divide 70 in the ratio 1:3:1

    Answer: 14, 42 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 6, 12, 21, 49, 42, 36, 48

    Answer: 30.6

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