Problem Solving (PS) | Re: TOUGH & TRICKY SET Of PROBLEMS

1. THE SUM OF EVEN INTEGERS:
The sum of the even numbers between 1 and k is 79*80, where k is an odd number, then k=?

(A) 79
(B) 80
(C) 81
(D) 157
(E)159

OPEN DISCUSSION OF THIS QUESTION IS HERE: https://gmatclub.com/forum/the-sum-of-t ... 68732.html


2. THE PRICE OF BUSHEL:
The price of a bushel of corn is currently $3.20, and the price of a
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