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Cornerstone · Grades 3–5 Keystones #1 8 September 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 8 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 2⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 2x + 11 = 23

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:3:3

    Answer: 12, 36 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 27, 8, 5, 42, 37, 25, 38

    Answer: 26

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