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Cornerstone · Grades 3–5 Keystones #1 20 December 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 20 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 14 = 26

    Answer: x = 4
  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 121 in the ratio 4:3:4

    Answer: 44, 33 and 44
  5. 5. Statistics Mean

    Find the mean of: 7, 17, 3, 5

    Answer: 8

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