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4meonly wrote:Is a/b an integer?
(1) 4a/b is an integer
4(a/b) is integer
if it is 4, a/b = integer
if it is 5 , a/b is not an integer
INSUF
(2) 4b/a is an integer
if b/a = 1, 4b/a is an integer and a/b is an integer
if b/a is 2 , 4b/1 is an integer but a/b is not! (1/2)
(1+2)
a = 4 b = 8
4a/b = integer
4b/a = integer
a/b is not an integer
I learned this method from Cramya
aj5105 wrote:I got C as the answer.
Cramya,
could you please explain taking both together?
thanks!
Is a/b an integer?4meonly wrote:Are there any methods without plugin numbers?
Algebraic?
