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

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 2⁄5

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

    Solve: 6x + 15 = 63

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 4:3:2

    Answer: 56, 42 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 11, 17, 50, 37, 18, 39, 36, 17. Give your answer to 2 decimal places

    Answer: 28.13

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