If all lectures arranged in ascending order of their ages, What will be the position of the two male lectures?

Write down the given information in the table.

Here the age is ranked in ascending order. (1 is the youngest while 6 means the oldest).

Apart from this, there is some more information that T is older than P but younger than Q and U

And P is older than R, U is not the youngest.

Given T is older than P. So, T is not the youngest, P is older than R so P is not the youngest. Also, P is younger than Q and U, So both are not the youngest. The remaining one is R and he is the youngest.

Since it is given the youngest teaches Biology R teaches biology.

Now the subjects are clear and from that, we can say the gender as well. (From point 2)

T is older than P but younger than Q and U.

From this age of Q, U>T>P

So P's rank in age is 2, T's is 3.

The ordering of R, T is 1,3.