Aptitude - Square Root and Cube Root - Discussion

They will collect "as many paise from each member of the group as is the number of members" that means amount of paise collected from each member is equal the total number of members. As they collected 5929 paise that means there should have been 77 members. And they collected 77 paise from each member.

Here, it is not given the accurate number of group members, so why we should take a group of 2 members or 3 members?

How? Please explation the answer.

First, let's take an example.

Consider there are 10 members in the group and everybody pay 10 paise.
So the total amount collected is the number of members * total money paid by each member = 10*10 = 100.
Now remember this and consider the given question..

Here number of members = Money collected by each member = x
total money collected = x*x
5929 = x^2
X =√ 5929.
x= 77.

Using the value of 100 is an untrue assumed value. Why not use 50 or 75?

Completely disagree. No value was provided and therefore there is insufficient information to correctly solve this problem.

Anyone, please clarify how to solve this.