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Cornerstone · Grades 3–5 Keystones #1 30 September 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 30 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 3⁄5

    Answer: 36⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 53

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 196 in the ratio 3:2:2

    Answer: 84, 56 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 41, 38, 16, 22, 37, 18, 33. Give your answer to 2 decimal places

    Answer: 29.29

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