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Cornerstone · Grades 3–5 Keystones #1 6 September 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 6 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 3⁄6

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

    Solve: 7x - 13 = 85

    Answer: x = 14
  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 28 in the ratio 3:1

    Answer: 21 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 24, 11, 23, 24, 38, 5, 36, 30. Give your answer to 2 decimal places

    Answer: 23.88

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