Define riddles
Many of the scholars, authors and readers has made a academic study on riddles, essentially focusing on collecting, cataloguing, or defining and studying of script and symbols riddles. The crucial work on cataloguing and typologising riddles was printed by Antti Aarne in the calendar year 1918-20, and also by Archer Taylor. 
In a short term, someone's mother has 4 sons answer is a brain buster or a rookie of a conversation. There are different types of riddle, Enigmas and Conundrums. An Enigma is an issue in which solutions are expressed metaphorically. So, one needs to think carefully about the riddle to think of the solution. About Conundrum are those sorts of riddle whose questions are available either the question or the response. For e.g. someone mom has four sons and their titles are North, South, and East respectively.
But however, if one appears and watch at the titles of the other children (north, east, west) it seems very likely that the title of this fourth kid is"south", that is keeping with the pattern (based on the cardinal direction). However, the best solution to this riddle is somebody. Someone's mother has 4 sons, North, west and south. Hence, the name of this fourth son is somebody.
Riddles are extremely important and helpful in our current time, solving a riddle improve the intelligence of their mind. It may boost and boost the mental aptitude level of an individual. Therefore, one needs to possess a open mind and cleverness to solve any kind/types of riddles however hard or simple.