9. Adam's house number is in exactly one of the following ranges. Which one?
A 123 to 213
B 132 to 231
C 123 to 312
D 231 to 312
E 312 to 321
9. E Note that the numbers 123 to 213 are in both option A and option C. Also, numbers 213 to
231 are in both option B and option C, and numbers 231 to 312 are in both C and D. However, numbers 313 to 321 are in option E only. So that must be where Adam's house is.