Question

What is the value of the underlined digit in 234, 500, 450

Answer 1

There isn't a specific number so i'll just list all of them. 

2 : 100 millions 
3 : 10 millions
4 : millions 
5 : 100 thousands
0 : 10 thousands
0 : thousands
4 : hundreds
5 : tens
0 : ones