The factor of 24 is (1, 2, 3, 4, 6, 8, 12, 24.

The factor of 38 is (1, 2, 19, 38.

)。 The greatest common factor of 16 and 24 is (8

), the greatest common factor of 24 and 38 is (

2) The greatest common factor of 16 and 38 is (2

)。

Of the three numbers 2.45, 9 and 5, (5,9) is (45.

) factor, (45

) is (5, 9

).

The greatest common factor of 3, 15 and 9 is (3

), the least common multiple is (45

)。

There is a two-digit number 5□. If it is a multiple of 5, you can fill in □ (0,5

)。 If it is a multiple of 3, you can fill in □ (1, 4, 7.

), if it is a multiple of 2 and 5, you can fill in □ (0

)。