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Cornerstone · Grades 3–5 Keystones #1 19 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄6

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 30

    Answer: x = 5
  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 85 in the ratio 3:2

    Answer: 51 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 31, 34, 13, 33, 38, 25

    Answer: 29

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