List of top Logical Reasoning Questions on Puzzle asked in NMAT

In a class of 10 students, K is to the left of L but to the right of M. N is to the left of M and to the right of J. J is to the left of K but to the right of L. Which of the following is true?

A, B, C, D, E, and F form three couples that are traveling on a train. Their ages are 24, 28, 29, 32, 34, and 35 years, not necessarily in the same order. Two of them are assigned upper berths, while one each is assigned a lower, a middle, a side lower, and a side upper berth.

The sum of the ages of the females is 14 years less than the sum of the ages of the males.
E is the youngest of the males and is assigned one of the side berths.
None of the females is assigned an upper berth.
The 32-year-old is assigned the middle berth.
D is 28 years old and is assigned the middle lower berth.
Neither A nor C is assigned an upper berth.
F is older than B. Which of the following statements is definitely true?