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Cornerstone · Grades 3–5 Keystones #1 12 December 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 12 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 7x + 11 = 53

    Answer: x = 6
  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

    Share 50 in the ratio 1:4

    Answer: 10 and 40
  5. 5. Statistics Mean

    Find the mean of: 5, 13, 9

    Answer: 9

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