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Cornerstone · Grades 3–5 Keystones #1 21 September 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 21 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x - 16 = 4

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 224 in the ratio 1:1:2

    Answer: 56, 56 and 112
  5. 5. Statistics Mean

    Calculate the mean of: 8, 25, 18, 47, 10, 5, 5. Give your answer to 2 decimal places

    Answer: 16.86

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