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Cornerstone · Grades 3–5 Keystones #1 16 December 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄4

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x + 12 = 75

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 15.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 182 in the ratio 2:2:3

    Answer: 52, 52 and 78
  5. 5. Statistics Mean

    Calculate the mean of: 24, 8, 49, 14, 12, 5, 20, 15. Give your answer to 2 decimal places

    Answer: 18.38

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