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

Five GCSE retrieval questions · 1 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 3⁄6

    Answer: 5⁄4
  2. 2. Algebra Two-step equations

    Solve: 5x + 4 = 39

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 125 in the ratio 2:2:1

    Answer: 50, 50 and 25
  5. 5. Statistics Mean

    Find the mean of: 7, 15, 9, 13

    Answer: 11

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