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Cornerstone · Grades 3–5 Keystones #1 13 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 13 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 2⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 2x - 15 = -5

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 196 in the ratio 2:3:2

    Answer: 56, 84 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 34, 43, 20, 33, 32, 42, 38, 21. Give your answer to 2 decimal places

    Answer: 32.88

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