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Cornerstone · Grades 3–5 Keystones #1 9 June 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 9 June 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 7x - 7 = 28

    Answer: x = 5
  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 35 in the ratio 4:3

    Answer: 20 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 16, 45, 15, 48, 21, 43, 7. Give your answer to 2 decimal places

    Answer: 27.86

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