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Cornerstone · Grades 3–5 Keystones #1 26 April 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 26 April 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 3⁄6

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

    Solve: 6x + 9 = 51

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 1:1:4

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

    Calculate the mean of: 12, 31, 23, 30, 25, 18, 38. Give your answer to 2 decimal places

    Answer: 25.29

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