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Cornerstone · Grades 3–5 Keystones #1 27 October 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄11 + 4⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 8x - 16 = 80

    Answer: x = 12
  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 126 in the ratio 3:4:2

    Answer: 42, 56 and 28
  5. 5. Statistics Mean

    Find the mean of: 14, 18, 9, 7

    Answer: 12