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Cornerstone · Grades 3–5 Keystones #1 16 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 16 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 9⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 10 = 11

    Answer: x = 7
  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 80 in the ratio 1:3:4

    Answer: 10, 30 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 32, 24, 41, 7, 42, 22, 16, 7. Give your answer to 2 decimal places

    Answer: 23.88

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