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Cornerstone · Grades 3–5 Keystones #1 21 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 21 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄5

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 27

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 184 in the ratio 3:1:4

    Answer: 69, 23 and 92
  5. 5. Statistics Mean

    Calculate the mean of: 19, 40, 29, 41, 6, 41, 44, 35. Give your answer to 2 decimal places

    Answer: 31.88

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