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Cornerstone · Grades 3–5 Keystones #1 25 February 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 25 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 7⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 6

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 2:3:1

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

    Calculate the mean of: 45, 27, 13, 27, 21, 19. Give your answer to 2 decimal places

    Answer: 25.33

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