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Cornerstone · Grades 3–5 Keystones #1 22 July 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄8 + 1⁄4

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 3x - 16 = 17

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 5, 12, 12, 20, 17, 43, 29, 9. Give your answer to 2 decimal places

    Answer: 18.38

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