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Cornerstone · Grades 3–5 Keystones #1 15 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 15 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x - 14 = 26

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

    Calculate the hypotenuse when a = 11cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 17.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:2:1

    Answer: 21, 42 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 28, 47, 36, 6, 29, 24, 6, 34

    Answer: 26.25

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