Mohit correctly remembers that his father's birthday is not after eighteenth of April. His sister correctly remembers that their
father's birthday is before twentieth but after seventeenth of April. On which day in April was definitely their father' birthday ?

In a row of forty boys facing North, R is twelfth from the left end and T is eighteenth from the right end. How many boys are
between R and T in the row ?

Pointing to a boy, Urmila said "He is the son of my grandfather's only daughter". How is Urmila related to the boy ?

How many meaningful English words can be made with the letters DREO using each letter only once in each word?

How many such pairs of letters are there in the word CONTRAST each of which has as many letters between them in the word
as in the English alphabet?

In a certain code 'GONE' is written as 'NOEGG' and 'LOAD' is written as 'AODLL'. How is 'SORT written in that code ?