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Cornerstone · Grades 3–5 Keystones #1 13 October 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 13 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 10⁄12 + 1⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 13 = 73

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

    Calculate the hypotenuse when a = 11cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 17.8cm
  4. 4. Ratio Sharing in a ratio

    Divide 125 in the ratio 2:1:2

    Answer: 50, 25 and 50
  5. 5. Statistics Mean

    Find the mean of: 5, 12, 7

    Answer: 8

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