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Cornerstone · Grades 3–5 Keystones #1 25 July 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 25 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄7

    Answer: 41⁄42
  2. 2. Algebra Two-step equations

    Solve: 8x - 20 = 84

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 17.2cm
  4. 4. Ratio Sharing in a ratio

    Divide 253 in the ratio 3:4:4

    Answer: 69, 92 and 92
  5. 5. Statistics Mean

    Find the mean of: 13, 2, 12, 19, 9

    Answer: 11

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