This is not statistical because you will not get variation in the data you will only get one anwser not multiple.
This is a statistical question because you will get lots of different anwsers so there will be variation on the data.
This is statistical because you will get multiple different answers from all the students. So there is variation in the data.
Statistical because there can be multiply possible awnsers therefor you can find the mean mode median and range. You can find these because there can be multiple different answers so multiple sets of data. So it is statistical.