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Cornerstone · Grades 3–5 Keystones #1 28 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 5⁄8

    Answer: 35⁄24
  2. 2. Algebra Two-step equations

    Solve: 7x + 12 = 96

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 13cm

    Answer: 16.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:1:2

    Answer: 42, 42 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 23, 35, 37, 35, 47, 13

    Answer: 31.7

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