105 is the sum
49
49
They are all positive two-digit whole numbers between 15 and 65. As to factors, only 1.
97
The two-digit factors of 100 and 1000 are all composite.
105 is the sum
105 is the sum
20 and 30 All numbers have at least one common factor.
63? But it has more than two one-digit factors.
63
97 has two factors.
There are 90 two-digit whole numbers between 1 and 100.
63.
Both 10 and 20 are two-digit numbers that are factors of 20.
25
24