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

Five GCSE retrieval questions · 1 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 2⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 7x + 6 = 27

    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 225 in the ratio 2:3:4

    Answer: 50, 75 and 100
  5. 5. Statistics Mean

    Find the mean of: 20, 9, 7, 16

    Answer: 13

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