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Cornerstone · Grades 3–5 Keystones #1 27 July 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 27 July 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 4⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x - 6 = 57

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

    Calculate the hypotenuse when a = 7cm and b = 12cm

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 3:2:3

    Answer: 81, 54 and 81
  5. 5. Statistics Mean

    Find the mean of: 3, 2, 20, 13, 8

    Answer: 9.2

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