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Cornerstone · Grades 3–5 Keystones #1 10 August 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 4⁄5

    Answer: 31⁄20
  2. 2. Algebra Two-step equations

    Solve: 7x - 8 = 20

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Share 100 in the ratio 1:4

    Answer: 20 and 80
  5. 5. Statistics Mean

    Find the mean of: 13, 6, 14

    Answer: 11

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