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Cornerstone · Grades 3–5 Keystones #1 30 September 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 3⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 35

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

    Calculate the hypotenuse when a = 11cm and b = 4cm

    Answer: 11.7cm
  4. 4. Ratio Sharing in a ratio

    Divide 192 in the ratio 3:2:3

    Answer: 72, 48 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 45, 20, 22, 7, 26, 47

    Answer: 27.8

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