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Cornerstone · Grades 3–5 Keystones #1 24 February 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 24 February 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄4

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 71

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 116 in the ratio 1:2:1

    Answer: 29, 58 and 29
  5. 5. Statistics Mean

    Find the mean of: 8, 2, 9, 9

    Answer: 7

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