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Cornerstone · Grades 3–5 Keystones #1 11 February 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 3⁄6

    Answer: 9⁄14
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 40

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 15.56cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 3:1:2

    Answer: 42, 14 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 36, 50, 15, 16, 33, 38, 41. Give your answer to 2 decimal places

    Answer: 32.71

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