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Cornerstone · Grades 3–5 Keystones #1 18 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 18 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x - 6 = 78

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 3:2

    Answer: 18 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 33, 39, 8, 18, 31, 36, 27. Give your answer to 2 decimal places

    Answer: 27.43

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