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Cornerstone · Grades 3–5 Keystones #1 1 February 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 February 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 7⁄8

    Answer: 73⁄56
  2. 2. Algebra Two-step equations

    Solve: 6x + 13 = 31

    Answer: x = 3
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 161 in the ratio 1:3:3

    Answer: 23, 69 and 69
  5. 5. Statistics Mean

    Find the mean of: 4, 18, 2, 20

    Answer: 11