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Cornerstone · Grades 3–5 Keystones #1 29 January 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 29 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 5x - 13 = 12

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 2:3

    Answer: 16 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 17, 29, 47, 48, 24, 5, 23. Give your answer to 2 decimal places

    Answer: 27.57

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