Which set of numbers has 21 as a common factor? {126, 168, 189}
{42, 88, 126}
{84, 105, 132}
{40, 63, 210}

Which set of numbers has 11 as a common factor?
{143, 221}
{154, 231}
{77, 91}
{33, 39}

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?