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Cornerstone · Grades 3–5 Keystones #1 11 November 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 November 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 2⁄3

    Answer: 31⁄24
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 55

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 13cm

    Answer: 13.93cm
  4. 4. Ratio Sharing in a ratio

    Divide 170 in the ratio 2:1:2

    Answer: 68, 34 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 42, 9, 24, 9, 48, 38, 48

    Answer: 31.1

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