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Cornerstone · Grades 3–5 Keystones #1 30 July 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 30 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 1⁄8

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 6x - 19 = 47

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.3cm
  4. 4. Ratio Sharing in a ratio

    Divide 115 in the ratio 1:2:2

    Answer: 23, 46 and 46
  5. 5. Statistics Mean

    Find the mean of: 13, 10, 15, 13, 9

    Answer: 12

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