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Cornerstone · Grades 3–5 Keystones #1 5 December 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 5 December 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 21

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 7.62cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 2:1:2

    Answer: 48, 24 and 48
  5. 5. Statistics Mean

    Find the mean of: 3, 16, 17

    Answer: 12

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