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Cornerstone · Grades 3–5 Keystones #1 12 August 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 12 August 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄5

    Answer: 31⁄30
  2. 2. Algebra Two-step equations

    Solve: 3x - 20 = 16

    Answer: x = 12
  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 252 in the ratio 4:1:4

    Answer: 112, 28 and 112
  5. 5. Statistics Mean

    Find the mean of: 25, 12, 5

    Answer: 14

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