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Cornerstone · Grades 3–5 Keystones #1 24 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 24 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 70

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 17.8cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 2:3:1

    Answer: 46, 69 and 23
  5. 5. Statistics Mean

    Find the mean of: 6, 9, 13, 16

    Answer: 11

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