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Cornerstone · Grades 3–5 Keystones #1 18 December 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 6⁄8

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 17 = 22

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 145 in the ratio 2:1:2

    Answer: 58, 29 and 58
  5. 5. Statistics Mean

    Find the mean of: 10, 10, 4

    Answer: 8

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