2. Once you look at all the answer choices, choose
the best one from the remaining choices that
aren’t crossed out.
3. If you can’t decide which is the best choice, take
your best guess.
Let’s try it with the previous question.
Answer choice
a is
All even integers are in set A
. Let’s decide whether this is true. We know that
all inte- gers in set A
are odd. This statement means that there are
not any even integers in set
A, so
All even integers are in set A cannot be true. Cross out answer choice
a !
Answer choice
b is
All odd integers are in set A
. Let’s decide whether this is true. We know that
all inte- gers in set A
are odd, which means that the set could be,
for example, {3}, or {1, 3, 5, 7, 9, 11}, or {135, 673, 787}.
It describes any set that contains only odd integers,
which means that it could also describe a set that con-
tains
all the odd integers. Therefore, this answer choice
may be correct. Let’s hold onto it and see how it com-
pares to the other answer choices.
Answer choice
c is
Some integers in set A
are even. We already determined when evaluating answer choice
a that there are not any even integers in set
A, so answer
choice
c cannot be true. Cross out answer choice
c !
Answer choice
d is
If an integer is even, it is not in set A
. We already determined that there are not any even
integers in set
A, so it seems that
If an integer is even, it is not in set A is most likely true. This is probably the
correct answer. But let’s evaluate the last answer choice
and then choose the best answer choices from the ones
we haven’t eliminated.
Answer choice
e is
If an integer is odd, it is not in set A
. Let’s decide whether this is true. We know that
all integers in set A
are odd, which means that there is at
least one odd integer in set
A and maybe more. There-
fore, answer choice
