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Cornerstone · Grades 3–5 Keystones #1 23 December 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 23 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 2x + 10 = 18

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

    Calculate the hypotenuse when a = 4cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 8.94cm
  4. 4. Ratio Sharing in a ratio

    Divide 75 in the ratio 1:3:1

    Answer: 15, 45 and 15
  5. 5. Statistics Mean

    Find the mean of: 20, 12, 23, 14, 6

    Answer: 15

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