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Cornerstone · Grades 3–5 Keystones #1 21 December 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 21 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄11 + 1⁄11

    Answer: 3⁄11
  2. 2. Algebra Two-step equations

    Solve: 7x + 7 = 70

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 15cm

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 1:2

    Answer: 28 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 26, 26, 28, 25, 22, 23, 27, 35

    Answer: 26.5

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