Answer :
The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40 .
The factors of 48 are 1, 2, 3, 4, 6, 8, 12, 16, 24, and 48 .
The factors that are common to 40 and 48 are 1, 2, 4, and 8 .
The greatest one is 8 .
The factors of 48 are 1, 2, 3, 4, 6, 8, 12, 16, 24, and 48 .
The factors that are common to 40 and 48 are 1, 2, 4, and 8 .
The greatest one is 8 .