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Cornerstone · Grades 3–5 Keystones #1 30 April 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 30 April 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄12 + 4⁄12

    Answer: 5⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 60

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 12cm

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Share 77 in the ratio 4:3

    Answer: 44 and 33
  5. 5. Statistics Mean

    Calculate the mean of: 35, 9, 48, 49, 8, 28, 16, 13

    Answer: 25.8

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