Decode this picture on T-Shirt and tell what it says ?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

The more of this there is, the less you see. What is it?

What does this rebus mean?

O
N
C
E
TIME

How can you leave a room with two legs and return with six legs?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

Count the number of squares in the picture below.

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E