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Cornerstone · Grades 3–5 Keystones #1 14 August 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 14 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 5⁄6

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 85

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

    Calculate the hypotenuse when a = 3cm and b = 5cm

    Answer: 5.83cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 2:1

    Answer: 28 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 44, 5, 13, 48, 28, 8, 26, 26

    Answer: 24.8

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