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Cornerstone · Grades 3–5 Keystones #1 26 August 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 August 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 6x + 5 = 23

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

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

    Answer: 14.14cm
  4. 4. Ratio Sharing in a ratio

    Divide 150 in the ratio 1:1:4

    Answer: 25, 25 and 100
  5. 5. Statistics Mean

    Calculate the mean of: 50, 7, 12, 50, 17, 37, 46

    Answer: 31.3

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