18. Which of these is closest in size to 1 ?
A $0 . \dot{9} \dot{5}$
B $1.0 \dot{5}$
С $0 . \dot{9} 6 \dot{0}$
D $1 . \dot{0} 4 \dot{0}$
E $0.9 \dot{5}$
18. C First note that $0.9 \dot{5}<0 . \dot{9} \dot{5}<0 . \dot{9} 6 \dot{0}<1<1 . \dot{0} 4 \dot{0}<1 . \dot{0} \dot{5}$, so $0 . \dot{9} 6 \dot{0}$ or $1 . \dot{0} 4 \dot{0}$ is closest to 1 . Also, note that $0 . \dot{9} 6 \dot{0}=0.960960 \ldots$, which differs from 1 by less than 0.04 . However, $1 . \dot{0} 4 \dot{0}=1.040040 \ldots$, which differs from 1 by greater than 0.04 . So $0 . \dot{9} 6 \dot{0}$ is closest in size to 1 .