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Cornerstone · Grades 3–5 Keystones #1 23 November 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 5⁄6

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 43

    Answer: x = 5
  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

    Share 45 in the ratio 4:1

    Answer: 36 and 9
  5. 5. Statistics Mean

    Find the mean of: 2, 9, 24, 17, 18

    Answer: 14

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