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Cornerstone · Grades 3–5 Keystones #1 31 August 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 31 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x - 14 = 21

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 6cm

    Answer: 7.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 102 in the ratio 2:3:1

    Answer: 34, 51 and 17
  5. 5. Statistics Mean

    Find the mean of: 9, 10, 20, 7, 8

    Answer: 10.8

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