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Cornerstone · Grades 3–5 Keystones #1 8 October 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 8 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄6

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 5 = 55

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:3:3

    Answer: 24, 72 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 29, 13, 47, 38, 44, 11, 49, 50. Give your answer to 2 decimal places

    Answer: 35.13

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