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Cornerstone · Grades 3–5 Keystones #1 3 March 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄12 + 10⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x + 13 = 61

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 7cm

    Answer: 8.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 330 in the ratio 4:4:3

    Answer: 120, 120 and 90
  5. 5. Statistics Mean

    Calculate the mean of: 5, 17, 40, 37, 19, 15, 32, 20

    Answer: 23.1

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