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Cornerstone · Grades 3–5 Keystones #1 24 June 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 24 June 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄3

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x - 6 = 46

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 1:2

    Answer: 8 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 12, 8, 7, 12, 7, 46, 47. Give your answer to 2 decimal places

    Answer: 19.86

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