Some problems read, for example, “n is divisible by all of the following, except…” Pay close attention to the specific language given in the problem. It stinks to do all the work properly, only to forget that the question was asking for “all of the following, except…”

Another great strategy on these questions is to write down A through E on your scratch paper and give each one that does fit the criteria a checkmark and the one that doesn’t fit the criteria an X. Then you have a visual reminder to pick the odd man out. Your work might look like this:

n is divisible by all of the following, except

A. ✔

B. X

C. ✔

D. ✔

E. ✔

Warmest regards,

Scott Woodbury-Stewart
Founder & CEO, Target Test Prep