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Cornerstone · Grades 3–5 Keystones #1 25 April 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 25 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x - 15 = 35

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

    Calculate the hypotenuse when a = 7cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 9.22cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 3:3:4

    Answer: 63, 63 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 50, 11, 38, 35, 12, 30, 9. Give your answer to 2 decimal places

    Answer: 26.43

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