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Cornerstone · Grades 3–5 Keystones #1 16 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x - 8 = 20

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 15.26cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 3:1:4

    Answer: 30, 10 and 40
  5. 5. Statistics Mean

    Find the mean of: 8, 10, 20, 10

    Answer: 12

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