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Cornerstone · Grades 3–5 Keystones #1 27 February 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 27 February 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 8x - 19 = 85

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 2:3

    Answer: 30 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 27, 40, 17, 36, 22, 34, 25. Give your answer to 2 decimal places

    Answer: 28.71

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