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Cornerstone · Grades 3–5 Keystones #1 18 September 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 18 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 1⁄8

    Answer: 39⁄56
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 33

    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 76 in the ratio 3:1

    Answer: 57 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 26, 8, 14, 8, 49, 50, 21, 19. Give your answer to 2 decimal places

    Answer: 24.38

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