What begins with T, ends with T, and has T in it?

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

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

Next Number in the Series,

5, 16, 49, 104, ?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Count the number of squares in the picture below.

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

what does the below math rebus puzzle mean?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?