{1,2,3,K 175,176,177,178 }
How many numbers in the set above have 5 as a factor but do not have 10 as a factor?
(A) 1 (B) 3 (C) 4 (D) 17 (E) 18
For a number to be divisible by 5, it's last digit must be either 5 or 0. For a number to be divisible by 10 its last digit must be 0.
Hence for a number to have 5 as a factor, but not 10, it's last digit must be 5 only.
One number in the set you posted has 5 as its last digit.