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Cornerstone · Grades 3–5 Keystones #1 17 August 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 17 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 5⁄8

    Answer: 57⁄40
  2. 2. Algebra Two-step equations

    Solve: 6x - 7 = 77

    Answer: x = 14
  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 144 in the ratio 3:1:4

    Answer: 54, 18 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 44, 17, 9, 47, 48, 17, 47. Give your answer to 2 decimal places

    Answer: 32.71

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