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Cornerstone · Grades 3–5 Keystones #1 21 September 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 21 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 3⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x + 8 = 33

    Answer: x = 5
  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

    Divide 135 in the ratio 1:1:3

    Answer: 27, 27 and 81
  5. 5. Statistics Mean

    Calculate the mean of: 50, 34, 46, 42, 48, 30. Give your answer to 2 decimal places

    Answer: 41.67

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