What is the greatest common factor of the positive integers j and k?
(1) k = j + 1
(2) jk is divisible by 5
OA d??
(1) k = j + 1
(2) jk is divisible by 5
OA d??
am getting A
stmnt 1) k = j + 1
=> j and k are consecutive integers and positive.
so the greatest common factor between them will be 1.
(one will be even and one odd)
sufficient
stmnt 2) jk is divisible by 5
if jk=5, say j=5, k=1 gcd: 1
if jk=25, j=5, k=5, gcd:5 or if j=25, k=1, gcd=1
we dont get a unique gcd
not sufficient
hence A
