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Cornerstone · Grades 3–5 Keystones #1 16 June 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 16 June 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 4⁄6

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 8x - 13 = 107

    Answer: x = 15
  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 50 in the ratio 2:2:1

    Answer: 20, 20 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 27, 19, 44, 15, 13, 44, 40, 19. Give your answer to 2 decimal places

    Answer: 27.63

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