4
It's a typical format for writing the values of large resistors. The k means thousand, and the position indicates a decimal point. In this example, 6k8 means 6,800.
Any number of the form 9*k where k is an integer.
Any number in the form 9k where k is the integers. Many numbers are divisible by 9, such as.. 9, 18, 27, 36, ....
29 is not divisible by 9. 29 divided by 9 = 3 and 2/9
They are members of the infinite set of numbers of the form 9*k where k is an integer. Since the set is infinite, it is not possible to list them.
Any one of the infinite set of numbers of the form 3,237,441,264*k where k is an integer.
Any element of the set of numbers of the form 725*k where k is an integer.
Any number of the form 72*k, where k is an integer, is evenly divisible.
Any element of the set of numbers of the form *k, where k is an integer, is evenly divisible. However, 308 is not evenly divisible by either.
Any element of the set of numbers of the form 126*k, where k is an integer, is evenly divisible.126*k = 9*(14*k)126*k = 6*(21*k)126*k = 7*(18*k)
18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, 117, 126, 135, 144, 153, 162, 171, 180,189,198,207,216,225,234,243,252,261,270,279,288,297,306
3, 9, 37, 109, 111, 327, 333, 981, 4033, 12099.