If y and z are integers, is y(z + 1)

If y and z are integers, is y(z + 1) odd?

1. y is odd
2. z is even

Q Stem : IS y(z + 1) odd ?

Only when y – Odd and  Z+1 is Odd i.e. Z – Even, we can get the required.

Stmt 1) Insuff  as no info on Z

Stmt 1) Insuff as no info on Y

Together – Suff.