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Cornerstone · Grades 3–5 Keystones #1 22 November 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 22 November 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 1⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 51

    Answer: x = 6
  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

    Divide 120 in the ratio 2:1:1

    Answer: 60, 30 and 30
  5. 5. Statistics Mean

    Find the mean of: 11, 8, 15, 20, 16

    Answer: 14

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