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Cornerstone · Grades 3–5 Keystones #1 9 November 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 9 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 7x - 10 = 46

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 117 in the ratio 2:4:3

    Answer: 26, 52 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 48, 50, 35, 15, 20, 33, 25, 24

    Answer: 31.25

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