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Cornerstone · Grades 3–5 Keystones #1 12 November 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 12 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 1⁄4

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 5x - 15 = 50

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 5cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics Mean

    Find the mean of: 6, 5, 16, 11, 12

    Answer: 10

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