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Cornerstone · Grades 3–5 Keystones #1 21 September 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 2⁄3

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 49

    Answer: x = 8
  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 44 in the ratio 1:3

    Answer: 11 and 33
  5. 5. Statistics Mean

    Find the mean of: 3, 7, 2, 13, 15

    Answer: 8

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