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Cornerstone · Grades 3–5 Keystones #1 3 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄8 + 4⁄5

    Answer: 13⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x + 6 = 42

    Answer: x = 12
  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

    Divide 190 in the ratio 4:3:3

    Answer: 76, 57 and 57
  5. 5. Statistics Mean

    Find the mean of: 3, 19, 12, 11, 20

    Answer: 13

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