If N = 5/6 + 6/7 + 7/8 + 8/9 + 9/10 + 10/11, then which of the following must be true of N? Choose the correct answer:	A) 5/6 < N < 10/11	B) 21/10 < N < 9/2	C) 5 < N < 5 1/11	D) 5 < N < 5 5/11	E) 30 < N < 60
Each fraction is close to 1 so we know that the sum will be less than 6.   Lets just say they're each 1 so N=6.   But now we have to subtract the difference   1/6+1/7+1/8+1/9+1/10+1/11.   We can estimate these each as 1/10--&gt;5/10 which is 1/2.   5 &lt; N &lt; 5 5/11 is the closest representation
<result>D</result>
If N = 5/6 + 6/7 + 7/8 + 8/9 + 9/10 + 10/11, then which of the following must be true of N?