Fill in the blanks in the following
1. Extreme digit of any number is its digit at ………………….
2. Ekadhik of 5 is represented as ………………….
3. Ekanyunof 8 is ………………….
4. Ekadhiken purvena of digit 3 in number 23 is ………………….
5. In vedic mathematics …………………. is one of the method of multiplication.