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Cornerstone · Grades 3–5 Keystones #1 26 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 26 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 3⁄4

    Answer: 23⁄20
  2. 2. Algebra Two-step equations

    Solve: 8x - 15 = 81

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 8.94cm
  4. 4. Ratio Sharing in a ratio

    Divide 105 in the ratio 1:3:3

    Answer: 15, 45 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 28, 5, 16, 43, 37, 19, 38. Give your answer to 2 decimal places

    Answer: 26.57

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