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Cornerstone · Grades 3–5 Keystones #1 23 August 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 23 August 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 3x - 10 = 14

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 3:2:1

    Answer: 69, 46 and 23
  5. 5. Statistics Mean

    Calculate the mean of: 37, 5, 5, 29, 32, 17

    Answer: 20.8

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