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Cornerstone · Grades 3–5 Keystones #1 24 September 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 24 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 4x - 12 = 40

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 130 in the ratio 3:4:3

    Answer: 39, 52 and 39
  5. 5. Statistics Mean

    Find the mean of: 6, 14, 19, 17

    Answer: 14

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