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Cornerstone · Grades 3–5 Keystones #1 15 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 1⁄8

    Answer: 55⁄56
  2. 2. Algebra Two-step equations

    Solve: 7x + 12 = 89

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 48 in the ratio 1:2:1

    Answer: 12, 24 and 12
  5. 5. Statistics Mean

    Find the mean of: 8, 17, 13, 6

    Answer: 11

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