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If positive integer 36y is divisible by 10, which of the following must be true?
I. y^2 is divisible by 25.
II. y^2 is divisible by 100.
III. 3y/15 is an integer.
A. I only
B. II only
C. III only
D. I and II only
E. I and III only
[spoiler]OA=E[/spoiler]
Source: Veritas Prep
I. y^2 is divisible by 25.
II. y^2 is divisible by 100.
III. 3y/15 is an integer.
A. I only
B. II only
C. III only
D. I and II only
E. I and III only
[spoiler]OA=E[/spoiler]
Source: Veritas Prep
