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Cornerstone · Grades 3–5 Keystones #1 11 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 11 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄8

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 35

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 3:2

    Answer: 51 and 34
  5. 5. Statistics Mean

    Find the mean of: 4, 3, 14

    Answer: 7

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