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Cornerstone · Grades 3–5 Keystones #1 14 September 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 1⁄6

    Answer: 7⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 6 = 30

    Answer: x = 8
  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 75 in the ratio 2:2:1

    Answer: 30, 30 and 15
  5. 5. Statistics Mean

    Find the mean of: 7, 15, 13, 4, 6

    Answer: 9

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