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Cornerstone · Grades 3–5 Keystones #1 18 February 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 18 February 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 1⁄3

    Answer: 11⁄15
  2. 2. Algebra Two-step equations

    Solve: 8x - 15 = 73

    Answer: x = 11
  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 36 in the ratio 1:2

    Answer: 12 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 39, 11, 27, 32, 21, 33, 27. Give your answer to 2 decimal places

    Answer: 27.14

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