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Cornerstone · Grades 3–5 Keystones #1 28 March 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x - 9 = 51

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

    Calculate the hypotenuse when a = 6cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 152 in the ratio 2:3:3

    Answer: 38, 57 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 41, 46, 39, 40, 16, 45, 5, 11. Give your answer to 2 decimal places

    Answer: 30.38

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