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Cornerstone · Grades 3–5 Keystones #1 25 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 25 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x - 13 = 1

    Answer: x = 7
  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 261 in the ratio 4:1:4

    Answer: 116, 29 and 116
  5. 5. Statistics Mean

    Calculate the mean of: 44, 47, 29, 16, 35, 24, 47, 9. Give your answer to 2 decimal places

    Answer: 31.38

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