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Cornerstone · Grades 3–5 Keystones #1 27 May 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 27 May 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄10 + 4⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 4x - 13 = 15

    Answer: x = 7
  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 150 in the ratio 2:2:1

    Answer: 60, 60 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 20, 36, 38, 32, 50, 30, 40, 43. Give your answer to 2 decimal places

    Answer: 36.13

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