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Cornerstone · Grades 3–5 Keystones #1 25 June 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 June 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄8

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 55

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Divide 80 in the ratio 2:3:3

    Answer: 20, 30 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 5, 8, 34, 16, 17, 43

    Answer: 20.5

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