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Cornerstone · Grades 3–5 Keystones #1 19 October 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 October 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 4x + 7 = 51

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 240 in the ratio 4:3:1

    Answer: 120, 90 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 28, 49, 21, 11, 21, 49, 23, 8

    Answer: 26.3

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