I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Using Only Five 5's and any mathematical operator make sum as 37

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

If an electric train is travelling south, then which way is the smoke going?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).