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Cornerstone · Grades 3–5 Keystones #1 18 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 18 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 72

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

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

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

    Divide 200 in the ratio 1:1:2

    Answer: 50, 50 and 100
  5. 5. Statistics Mean

    Find the mean of: 12, 13, 18, 9

    Answer: 13

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