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Cornerstone · Grades 3–5 Keystones #1 21 December 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 December 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄7

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

    Solve: 3x - 6 = 33

    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

    Share 133 in the ratio 4:3

    Answer: 76 and 57
  5. 5. Statistics Mean

    Find the mean of: 20, 19, 3, 9, 4

    Answer: 11

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