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Cornerstone · Grades 3–5 Keystones #1 9 April 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 4⁄8

    Answer: 11⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 15

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Share 57 in the ratio 1:2

    Answer: 19 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 9, 20, 23, 34, 25, 15, 46. Give your answer to 2 decimal places

    Answer: 24.57

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