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Cornerstone · Grades 3–5 Keystones #1 25 December 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 25 December 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄12 + 6⁄12

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 2x - 15 = 15

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 4:3:3

    Answer: 64, 48 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 16, 18, 10, 13, 23, 17. Give your answer to 2 decimal places

    Answer: 16.17

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