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Cornerstone · Grades 3–5 Keystones #1 20 September 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 2⁄3

    Answer: 32⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x - 17 = 3

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 18.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 3:1:4

    Answer: 30, 10 and 40
  5. 5. Statistics Mean

    Find the mean of: 15, 9, 18

    Answer: 14

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