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Cornerstone · Grades 3–5 Keystones #1 29 June 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 29 June 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

    Answer: 2⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x - 18 = 6

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 5cm

    Answer: 5.83cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 1:4

    Answer: 7 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 14, 6, 8, 9, 14, 37, 23, 20

    Answer: 16.4

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