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Cornerstone · Grades 3–5 Keystones #1 5 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 5 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 4⁄7

    Answer: 15⁄14
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 35

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 14cm

    Answer: 18.44cm
  4. 4. Ratio Sharing in a ratio

    Divide 161 in the ratio 2:3:2

    Answer: 46, 69 and 46
  5. 5. Statistics Mean

    Calculate the mean of: 35, 26, 24, 20, 23, 29, 12, 11

    Answer: 22.5

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