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Cornerstone · Grades 3–5 Keystones #1 14 October 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 6⁄8

    Answer: 19⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 61

    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 168 in the ratio 2:3:1

    Answer: 56, 84 and 28
  5. 5. Statistics Mean

    Find the mean of: 8, 4, 18

    Answer: 10

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