The question 'Whose this?' is not correct.
Using the interrogative pronoun 'whose' requires a verb:
Whose.
Thanks to the Central Limit Theorem, the sampling distribution of the mean is Gaussian (normal) whose mean is the population mean and whose standard deviation is the sample standard error.
What do you mean? Do you mean somebody who's name is "Is"?
Whose question is this? The person whose question this is didn't make it clear what they mean by 'how else'. Well, it doesn't matter whose question this is, we can only do the best we can.
A person whose views are different from their leaders
" Sreejata " --- someone whose birth is auspicious.
Perhaps you mean "beautician", a person whose job it is to make people beautiful.
Variables mean whose values are not constant, such as x, y , z this is in algebra
Someone whose main interest is seducing women.
Used with a person followed by a noun and than a verb
"A woman whose occupation is sewing."-Merriam Webster
"Whose car is it?"