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Cornerstone · Grades 3–5 Keystones #1 17 March 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 17 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 1⁄4

    Answer: 27⁄28
  2. 2. Algebra Two-step equations

    Solve: 2x + 8 = 18

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 1:3:2

    Answer: 15, 45 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 28, 30, 15, 29, 15, 7, 48, 35. Give your answer to 2 decimal places

    Answer: 25.88

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