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Cornerstone · Grades 3–5 Keystones #1 4 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄4

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x - 5 = 15

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

    Calculate the hypotenuse when a = 11cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Share 27 in the ratio 1:2

    Answer: 9 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 16, 15, 50, 49, 30, 45, 18. Give your answer to 2 decimal places

    Answer: 31.86

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