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Cornerstone · Grades 3–5 Keystones #1 7 June 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 7 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 1⁄3

    Answer: 29⁄24
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 12

    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 132 in the ratio 1:1:4

    Answer: 22, 22 and 88
  5. 5. Statistics Mean

    Calculate the mean of: 26, 20, 6, 48, 47, 47, 45, 28. Give your answer to 2 decimal places

    Answer: 33.38

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