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Cornerstone · Grades 3–5 Keystones #1 12 February 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 12 February 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 3⁄5

    Answer: 39⁄40
  2. 2. Algebra Two-step equations

    Solve: 6x + 11 = 41

    Answer: x = 5
  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

    Divide 110 in the ratio 1:2:2

    Answer: 22, 44 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 41, 33, 5, 12, 29, 14, 25. Give your answer to 2 decimal places

    Answer: 22.71

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