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Cornerstone · Grades 3–5 Keystones #1 28 September 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 28 September 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄11 + 3⁄11

    Answer: 6⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x + 3 = 13

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 2:3:1

    Answer: 40, 60 and 20
  5. 5. Statistics Mean

    Find the mean of: 8, 4, 8, 19

    Answer: 9.75

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