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Cornerstone · Grades 3–5 Keystones #1 21 December 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 21 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 3⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 2x - 15 = -3

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 112 in the ratio 2:3:2

    Answer: 32, 48 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 31, 18, 50, 47, 38, 40, 42

    Answer: 38

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