Eric (tutor): You don't have to rub it in.
Matt P (student): Sometimes rubbing it in is a good thing, like sunblock.


Eric plugs in numbers for variables whenever he can on both the ACT and the SAT. The following problem is from the SAT:
If j,k,l,m and n are consecutive integers and j<k<l<m<n, then what is the value of (j + n) - (k + m) ?
A. 0
B. 1
C. 2
D. 4
E. It cannot be determined from the information given.
The only requirement is that the numbers are consecutive, and each one is bigger than the one preceding it. In this example, I will pick 4,5,6,7,8. These fulfill the requirements stated in the problem because they are consecutive, and the following is true: 4<5<6<7<8. Now, I simply plug my values into the given problem:
(4 + 8) - ( 5 + 7)
This is a simple arithmetic problem that I can easily solve. 12 - 12 = 0, therefore the correct answer is A.
