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Cornerstone · Grades 3–5 Keystones #1 30 October 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 30 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄3

    Answer: 23⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x - 15 = 13

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 6cm

    Answer: 9.22cm
  4. 4. Ratio Sharing in a ratio

    Divide 176 in the ratio 2:3:3

    Answer: 44, 66 and 66
  5. 5. Statistics Mean

    Find the mean of: 11, 8, 3, 17, 16

    Answer: 11

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