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Cornerstone · Grades 3–5 Keystones #1 26 November 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 4⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 4x - 5 = 19

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 1:1:4

    Answer: 15, 15 and 60
  5. 5. Statistics Mean

    Find the mean of: 15, 17, 19, 10, 4

    Answer: 13