Is Zero considered a multiple of all the numbers? I came across question # 13 in the Full-Length Practice Test of Kaplan which says-
Now here (1) and (2) separately aren't enough. (1) could be 2, 3, 5, 7, 11, 13. And (2) could be 7, 17, 37... this is where I'm corrected by the book, which says 0 also needs to be considered as a factor of a number- which would make the possible vales for (2) as 2, 7, 17, 37...Ques: If x is a prime number, what is the value of x?
(1) x < 15
(2) (x - 2) is a multiple of 5.
So considering 0 would change the answer of this question to (E)-both not sufficient from (C)-statement 1 & 2 together are sufficient.
If zero is a multiple of all the numbers, then shouldn't it be considered for calculating the LCM & GCM of all the numbers as well? :roll:
Thanks in advance