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Cornerstone · Grades 3–5 Keystones #1 8 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 3⁄8

    Answer: 9⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 37

    Answer: x = 11
  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 150 in the ratio 3:3:4

    Answer: 45, 45 and 60
  5. 5. Statistics Mean

    Find the mean of: 9, 22, 14

    Answer: 15

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