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Cornerstone · Grades 3–5 Keystones #1 7 September 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 7 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 2⁄4

    Answer: 9⁄8
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 30

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

    Calculate the hypotenuse when a = 11cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics Mean

    Find the mean of: 3, 15, 13, 17

    Answer: 12

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