integers

[daretodream]

If mn = 3(m+1) + n and m and n are integers, m could be any of the following values EXCEPT:

(A) 2
(B) 3
(C) 4
(D) 5
(E) 7

[harsh.champ]

If mn = 3(m+1) + n and m and n are integers, m could be any of the following values EXCEPT:

(A) 2
(B) 3
(C) 4
(D) 5
(E) 7

My doubt is :-Are you multiplying m X n or is mn a 2 digit number(That would make it 10m + n)??

[thephoenix]

If mn = 3(m+1) + n and m and n are integers, m could be any of the following values EXCEPT:

(A) 2
(B) 3
(C) 4
(D) 5
(E) 7

solving the eqn will be
m(n-3)=3+n

now plug in value for m and check the value of it should be an integer
for all value of m given above except m=5 n is int
so ans is D