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Cornerstone · Grades 3–5 Keystones #1 23 August 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 8⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 2x + 15 = 35

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

    Calculate the hypotenuse when a = 3cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.3cm
  4. 4. Ratio Sharing in a ratio

    Divide 270 in the ratio 4:4:1

    Answer: 120, 120 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 21, 24, 13, 23, 44, 8, 10. Give your answer to 2 decimal places

    Answer: 20.43

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