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Cornerstone · Grades 3–5 Keystones #1 24 September 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 24 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 2⁄8

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 7x - 6 = 92

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 16.64cm
  4. 4. Ratio Sharing in a ratio

    Divide 104 in the ratio 4:3:1

    Answer: 52, 39 and 13
  5. 5. Statistics Mean

    Find the mean of: 18, 8, 1

    Answer: 9

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