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Cornerstone · Grades 3–5 Keystones #1 14 February 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄5

    Answer: 19⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x - 17 = 13

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

    Calculate the hypotenuse when a = 7cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 2:1

    Answer: 56 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 48, 25, 8, 12, 20, 49, 30, 27. Give your answer to 2 decimal places

    Answer: 27.38

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