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Cornerstone · Grades 3–5 Keystones #1 15 February 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 15 February 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 1⁄3

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 7x - 13 = 71

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

    Calculate the hypotenuse when a = 9cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 102 in the ratio 1:3:2

    Answer: 17, 51 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 10, 44, 13, 38, 14, 49, 32, 6

    Answer: 25.75

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