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

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄5

    Answer: 9⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x - 7 = 23

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 300 in the ratio 1:2:2

    Answer: 60, 120 and 120
  5. 5. Statistics Mean

    Calculate the mean of: 33, 26, 40, 15, 17, 32, 39, 19. Give your answer to 2 decimal places

    Answer: 27.63

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