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Cornerstone · Grades 3–5 Keystones #1 19 July 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 2⁄3

    Answer: 3⁄2
  2. 2. Algebra Two-step equations

    Solve: 4x + 7 = 23

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 9cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 243 in the ratio 3:4:2

    Answer: 81, 108 and 54
  5. 5. Statistics Mean

    Find the mean of: 14, 3, 19

    Answer: 12

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