Fifty-six ants marched in a rowEach ant had six legsIf half of the ants marched into the ant hill how many PAIRS of legs are still marching?

There are 56 ants, and each ant has 6 legs, so the total number of legs is 56 x 6 = 336 legs. If half of the ants, which is 28 ants, marched into the ant hill, then 28 ants are still marching. The number of legs still marching is 28 x 6 = 168 legs. Since we need the number of pairs of legs, we divide 168 by 2, resulting in 84 pairs of legs still marching.