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Cornerstone · Grades 3–5 Keystones #1 4 February 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 February 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 5⁄6

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 2x + 15 = 21

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

    Calculate the hypotenuse when a = 7cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 1:3:4

    Answer: 10, 30 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 18, 34, 9, 38, 18, 41, 33, 41

    Answer: 29

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