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Cornerstone · Grades 3–5 Keystones #1 11 December 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 2⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 21

    Answer: x = 3
  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 154 in the ratio 2:2:3

    Answer: 44, 44 and 66
  5. 5. Statistics Mean

    Calculate the mean of: 26, 35, 38, 7, 22, 38, 8, 8

    Answer: 22.75

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