What is the square root of 168,921?	Choose the correct choice:	A) 476	B) 389	C) 497	D) 411	E) 524
1) Checking the last digits in the answer options A, C, E are out since last digit of the square is known to be 1.   2) B = 389^2 and D = 411^2   B = (400-11)^2 and D = (400 + 11)^2   Since we need the answer less than 160000 =&gt; B is out.   Thus we have 411 as the ans.
<result>D</result>
What is the square root of 168,921?