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Cornerstone · Grades 3–5 Keystones #1 25 November 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 25 November 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 3⁄4

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 7 = 67

    Answer: x = 12
  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

    Share 55 in the ratio 3:2

    Answer: 33 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 32, 13, 46, 41, 39, 18, 7, 11. Give your answer to 2 decimal places

    Answer: 25.88

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