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Cornerstone · Grades 3–5 Keystones #1 26 September 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 26 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 3⁄4

    Answer: 11⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 8

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 14cm

    Answer: 14.87cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 1:4

    Answer: 17 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 8, 37, 8, 34, 26, 36, 37, 23

    Answer: 26.1

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