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Cornerstone · Grades 3–5 Keystones #1 21 July 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 21 July 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 43

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 2:3

    Answer: 10 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 17, 31, 28, 23, 29, 16, 27. Give your answer to 2 decimal places

    Answer: 24.43

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