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Cornerstone · Grades 3–5 Keystones #1 6 July 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 2⁄4

    Answer: 19⁄14
  2. 2. Algebra Two-step equations

    Solve: 6x - 17 = 31

    Answer: x = 8
  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 152 in the ratio 2:1:1

    Answer: 76, 38 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 11, 7, 35, 33, 49, 37. Give your answer to 2 decimal places

    Answer: 28.67