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Cornerstone · Grades 3–5 Keystones #1 18 April 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄4

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x - 17 = 58

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

    Calculate the hypotenuse when a = 8cm and b = 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 3:2

    Answer: 54 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 11, 38, 21, 17, 15, 11, 47. Give your answer to 2 decimal places

    Answer: 22.86

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