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Cornerstone · Grades 3–5 Keystones #1 8 November 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 8 November 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 3⁄10

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 7x - 14 = 21

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 2:1

    Answer: 56 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 17, 38, 10, 6, 18, 38. Give your answer to 2 decimal places

    Answer: 21.17

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