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Cornerstone · Grades 3–5 Keystones #1 13 June 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 5⁄7

    Answer: 65⁄42
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 28

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 17.8cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 1:4:4

    Answer: 20, 80 and 80
  5. 5. Statistics Mean

    Find the mean of: 18, 14, 11, 13

    Answer: 14

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