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Cornerstone · Grades 3–5 Keystones #1 2 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄6

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

    Solve: 5x + 15 = 35

    Answer: x = 4
  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 220 in the ratio 3:3:4

    Answer: 66, 66 and 88
  5. 5. Statistics Mean

    Calculate the mean of: 24, 31, 45, 43, 21, 20, 42. Give your answer to 2 decimal places

    Answer: 32.29

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