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Cornerstone · Grades 3–5 Keystones #1 19 February 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 19 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄3

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 2x + 5 = 21

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 10.44cm
  4. 4. Ratio Sharing in a ratio

    Share 91 in the ratio 4:3

    Answer: 52 and 39
  5. 5. Statistics Mean

    Find the mean of: 5, 8, 25, 14

    Answer: 13

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