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Cornerstone · Grades 3–5 Keystones #1 17 December 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 17 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x - 11 = 1

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 14.14cm
  4. 4. Ratio Sharing in a ratio

    Divide 230 in the ratio 3:3:4

    Answer: 69, 69 and 92
  5. 5. Statistics Mean

    Find the mean of: 7, 14, 8, 11, 15

    Answer: 11

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