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Cornerstone · Grades 3–5 Keystones #1 29 December 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 29 December 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄3

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 2x - 7 = 7

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 110 in the ratio 2:1:2

    Answer: 44, 22 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 29, 47, 21, 6, 27, 10. Give your answer to 2 decimal places

    Answer: 23.33

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