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Cornerstone · Grades 3–5 Keystones #1 13 February 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 1⁄3

    Answer: 19⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 72

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 11.18cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 3:1:2

    Answer: 63, 21 and 42
  5. 5. Statistics Mean

    Find the mean of: 2, 16, 20, 13, 9

    Answer: 12