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Cornerstone · Grades 3–5 Keystones #1 20 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 20 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x + 14 = 56

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 136 in the ratio 3:4:1

    Answer: 51, 68 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 26, 21, 19, 23, 12, 42, 7, 8

    Answer: 19.75

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