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Cornerstone · Grades 3–5 Keystones #1 14 November 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 14 November 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 1⁄4

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 75

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 2:1:1

    Answer: 60, 30 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 5, 34, 12, 12, 33, 25. Give your answer to 2 decimal places

    Answer: 20.17

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