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Cornerstone · Grades 3–5 Keystones #1 8 May 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 May 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 1⁄4

    Answer: 15⁄28
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 55

    Answer: x = 15
  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 154 in the ratio 4:4:3

    Answer: 56, 56 and 42
  5. 5. Statistics Mean

    Find the mean of: 8, 18, 7

    Answer: 11

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