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Cornerstone · Grades 3–5 Keystones #1 18 November 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 18 November 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

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

    Solve: 3x + 10 = 43

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 220 in the ratio 4:3:4

    Answer: 80, 60 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 38, 17, 20, 18, 37, 23, 20. Give your answer to 2 decimal places

    Answer: 24.71

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