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Cornerstone · Grades 3–5 Keystones #1 18 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄6

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 18

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

    Calculate the hypotenuse when a = 11cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 12.08cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 3:1:2

    Answer: 72, 24 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 8, 13, 18, 15, 20, 8, 42, 27. Give your answer to 2 decimal places

    Answer: 18.88

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