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Cornerstone · Grades 3–5 Keystones #1 12 July 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 12 July 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 2⁄5

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

    Solve: 8x - 10 = 62

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 13, 41, 10, 19, 9, 42, 11. Give your answer to 2 decimal places

    Answer: 20.71

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