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Cornerstone · Grades 3–5 Keystones #1 18 June 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 June 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 4⁄7

    Answer: 34⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 57

    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

    Share 60 in the ratio 3:1

    Answer: 45 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 42, 35, 31, 7, 40, 49, 24. Give your answer to 2 decimal places

    Answer: 32.57

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