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Cornerstone · Grades 3–5 Keystones #1 17 August 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄7

    Answer: 23⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 53

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

    Calculate the hypotenuse when a = 11cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 12.08cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 2:3

    Answer: 26 and 39
  5. 5. Statistics Mean

    Find the mean of: 6, 1, 20

    Answer: 9

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