How do you reach the answer of 700 for question what is the value of 7 in 1739?

Answer 1

The '7' in 1739 represents 700 because the number 1739 means (9 x 1) + (3 x 10) + (7 x 100) + (1 x 1000).

Each digit in the number is representing a multiple of a power of 10. I could rewrite the above as (9 x 100) + (3 x 101) + (7 x 102) + (1 x 103).