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Cornerstone · Grades 3–5 Keystones #1 16 March 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 March 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 5x + 3 = 18

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

    Calculate the hypotenuse when a = 8cm and b = 12cm

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 1:3

    Answer: 18 and 54
  5. 5. Statistics Mean

    Find the mean of: 17, 4, 18, 15, 20

    Answer: 14.8

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