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Cornerstone · Grades 3–5 Keystones #1 5 March 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 4⁄6

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

    Solve: 2x + 8 = 28

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 8.49cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 4:2:3

    Answer: 60, 30 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 15, 24, 36, 12, 18, 42, 48, 37

    Answer: 29

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