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Cornerstone · Grades 3–5 Keystones #1 22 October 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄12 + 5⁄12

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x + 4 = 54

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

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

    Answer: 11.31cm
  4. 4. Ratio Sharing in a ratio

    Divide 70 in the ratio 4:2:1

    Answer: 40, 20 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 25, 46, 7, 44, 10, 21, 42, 30. Give your answer to 2 decimal places

    Answer: 28.13

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