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

Five GCSE retrieval questions · 7 May 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄9 + 4⁄9

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

    Solve: 5x - 7 = 18

    Answer: x = 5
  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 156 in the ratio 1:4:1

    Answer: 26, 104 and 26
  5. 5. Statistics Mean

    Find the mean of: 20, 14, 2, 4

    Answer: 10

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