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Cornerstone · Grades 3–5 Keystones #1 28 September 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 7x + 3 = 66

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 9cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 8, 15, 18, 37, 12, 26, 46. Give your answer to 2 decimal places

    Answer: 23.14

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