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Cornerstone · Grades 3–5 Keystones #1 16 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄12 + 6⁄12

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 40

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 232 in the ratio 3:1:4

    Answer: 87, 29 and 116
  5. 5. Statistics Mean

    Find the mean of: 4, 13, 18, 3, 12

    Answer: 10

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