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Cornerstone · Grades 3–5 Keystones #1 9 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 1⁄3

    Answer: 22⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x + 10 = 46

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 3:1

    Answer: 18 and 6
  5. 5. Statistics Mean

    Find the mean of: 1, 19, 15, 2, 3

    Answer: 8

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