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

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

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄3

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 8x - 17 = 39

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 14.32cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 2:1:3

    Answer: 28, 14 and 42
  5. 5. Statistics Mean

    Find the mean of: 10, 3, 3, 3, 6

    Answer: 5

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