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Cornerstone · Grades 3–5 Keystones #1 8 February 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 8 February 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 1⁄3

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 12 = 44

    Answer: x = 7
  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 96 in the ratio 1:4:3

    Answer: 12, 48 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 48, 16, 28, 17, 42, 38, 7, 45. Give your answer to 2 decimal places

    Answer: 30.13

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