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Cornerstone · Grades 3–5 Keystones #1 13 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 1⁄7

    Answer: 29⁄56
  2. 2. Algebra Two-step equations

    Solve: 6x + 5 = 65

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Divide 162 in the ratio 3:1:2

    Answer: 81, 27 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 20, 13, 35, 6, 21, 49, 34, 21

    Answer: 24.9

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