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Cornerstone · Grades 3–5 Keystones #1 31 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 2⁄12

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x + 4 = 32

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 2:1:2

    Answer: 72, 36 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 15, 47, 36, 29, 12, 34, 26, 14. Give your answer to 2 decimal places

    Answer: 26.63

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