Question

Irfan exited his apartment building and walked 20 blocks west. He then walked an additional 5 blocks west.

What must he do to return to his apartment building?

To return to his apartment building, Irfan must walk 25 blocks east.

To return to his apartment building, Irfan should walk the same distance in the opposite direction. Therefore, he needs to walk 25 blocks east (20 blocks + 5 blocks) from his current location.