Equal amounts of water were poured into two empty jars of different capacities, which made one jar 1/4 full and the other jar 1/3 full. If the water in the jar with the lesser capacity is then poured into the jar with the greater capacity, what fraction of the larger jar will be filled with water?

Correct Answer: 1/3
Evidently, 1/3 full jar is of the lesser capacity as 1/3 is greater than 1/4. As equal amount of water was poured into each jar, pouring water from the jar of lesser capacity to the larger jar will make the amount of water in the larger jar to get doubled. Therefore, the fraction of larger jar filled with water will be = 2 x 1/4 = 1/2