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Cornerstone · Grades 3–5 Keystones #1 20 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 20 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄11 + 6⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x + 7 = 55

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 3:1:4

    Answer: 54, 18 and 72
  5. 5. Statistics Mean

    Find the mean of: 10, 8, 15, 7

    Answer: 10

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