How many such symbols are there in the above arrangement each of which is immediately preceded by a vowel and also immediately followed by a number ?

In a certain code ‘open the door’ is written as ‘ka te jo’ ‘door is closed’ is written as ‘jo pa ma’ and ‘this is good’ is written as ‘la ra pa’. What is the code for ‘closed’ ?

Pointing to a photograph Rasika said “He is the grandson of my grandmother’s only son.” How is the boy in photograph related to Rasika ?

How many meaningful English words can be made from the letters EOPR, using each letter only once ?

How many such pairs of letters are there in the word EXPERIMENT each of which have as many letters between them in the word as they have in the English alphabet ?

Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to the group ?