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Cornerstone · Grades 3–5 Keystones #1 23 March 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 4⁄6

    Answer: 29⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x - 15 = 41

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

    Calculate the hypotenuse when a = 12cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 18.44cm
  4. 4. Ratio Sharing in a ratio

    Divide 112 in the ratio 1:3:3

    Answer: 16, 48 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 34, 8, 7, 12, 12, 38, 31. Give your answer to 2 decimal places

    Answer: 20.29

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