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Cornerstone · Grades 3–5 Keystones #1 15 July 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄8 + 1⁄3

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x + 8 = 68

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 128 in the ratio 3:2:3

    Answer: 48, 32 and 48
  5. 5. Statistics Mean

    Find the mean of: 10, 11, 6

    Answer: 9

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