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

Five GCSE retrieval questions · 7 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 4⁄7

    Answer: 15⁄14
  2. 2. Algebra Two-step equations

    Solve: 5x + 4 = 19

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

    Calculate the hypotenuse when a = 5cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 7.81cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 2:1

    Answer: 28 and 14
  5. 5. Statistics Mean

    Find the mean of: 14, 5, 20

    Answer: 13

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