The smallest number in the set $\{3.2,2.3,3,2.23,3.22\}$ is
(A) 3.2
(B) 2.3
(C) 3
(D) 2.23
(E) 3.22
In the set, three of the numbers are greater than or equal to 3 , and two of the numbers are less than 3 .

The smallest number must be one of the numbers that is less than 3 , that is, 2.3 or 2.23 .

Of these two numbers, 2.23 is the smallest, so is the smallest number in the set.

ANSWER: (D)