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Cornerstone · Grades 3–5 Keystones #1 6 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 6 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x - 12 = 33

    Answer: x = 9
  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 100 in the ratio 4:1

    Answer: 80 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 7, 8, 29, 29, 32, 34. Give your answer to 2 decimal places

    Answer: 23.17

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