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

Five GCSE retrieval questions · 5 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 6⁄8

    Answer: 37⁄28
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 39

    Answer: x = 9
  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 160 in the ratio 2:1:2

    Answer: 64, 32 and 64
  5. 5. Statistics Mean

    Find the mean of: 10, 6, 5, 11

    Answer: 8

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