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Cornerstone · Grades 3–5 Keystones #1 25 August 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 25 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 4⁄6

    Answer: 29⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 16 = 48

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 3:1

    Answer: 51 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 39, 12, 11, 9, 8, 34, 31. Give your answer to 2 decimal places

    Answer: 20.57

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