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Cornerstone · Grades 3–5 Keystones #1 11 December 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 11 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 4⁄8

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x + 4 = 40

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

    Calculate the hypotenuse when a = 9cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Share 33 in the ratio 2:1

    Answer: 22 and 11
  5. 5. Statistics Mean

    Find the mean of: 9, 15, 19, 13

    Answer: 14

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