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Cornerstone · Grades 3–5 Keystones #1 2 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄4

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

    Solve: 5x - 6 = 39

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 4:3

    Answer: 40 and 30
  5. 5. Statistics Mean

    Find the mean of: 4, 15, 17, 20

    Answer: 14

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