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Cornerstone · Grades 3–5 Keystones #1 24 August 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 24 August 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄6

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 60

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 192 in the ratio 4:3:1

    Answer: 96, 72 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 15, 21, 15, 10, 33, 46. Give your answer to 2 decimal places

    Answer: 23.33

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