6 - [5/6 + {3 7/8 - 2 1/3 + 1 7/9}] = _____________?
Correct answer: D. None of these
- A. 3 9/13
- B. 1 9/11
- C. 2 11/72
- D. None of these
Explanation
Convert the mixed numbers and use denominator 72: 3 7/8 - 2 1/3 + 1 7/9 = 31/8 - 7/3 + 16/9 = 239/72. Hence 6 - [5/6 + 239/72] = 432/72 - 60/72 - 239/72 = 133/72 = 1 61/72. This is not any of options a, b, or c, so option d, None of these, is correct.
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