The lowest whole number that goes into 35, 81, and 15 is one. There is no larger number.
1, 3, 5, 15.
The number 5 is common to both 15 and 100.
The number 3
the number 15.
-15
3
1, 3, 5, 15.
1, 3, 5, 15.
1, 3, 5 and 15.
1, 3, 5 and 15
The number is 1.