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Cornerstone · Grades 3–5 Keystones #1 21 March 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 21 March 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 6x - 7 = 83

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Divide 72 in the ratio 3:1:2

    Answer: 36, 12 and 24
  5. 5. Statistics Mean

    Find the mean of: 20, 4, 10, 7, 19

    Answer: 12

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