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Cornerstone · Grades 3–5 Keystones #1 24 July 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 24 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄12 + 2⁄12

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 52

    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

    Divide 70 in the ratio 3:1:1

    Answer: 42, 14 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 32, 33, 27, 10, 7, 47, 41. Give your answer to 2 decimal places

    Answer: 28.14

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