A. 74836

= 7 × 10⁴ + 4 × 10³ + 8 × 10² + 3 × 10 + 6

B. 574021

= 5 × 10⁵ + 7 × 10⁴ + 4 × 10³ + 0 × 10² + 2 × 10 + 1

C. 8907010

= 8 × 10⁶ + 9 × 10⁵ + 0 × 10⁴ + 7 × 10³ + 0 × 10² + 1 × 10 + 0

[Use the fact that, Any number, say, ”a_na_{n - 1}a_{n - 2….}a₁a₀ can be expanded as :

= a_n × 10ⁿ + a_{n - 1} × 10^{n - 1} + a_{n - 2} × 10^{n - 2} + a_{n - 3} × 10^{n - 3} + … + a₁ × 10¹ + a₀ (note, n is the no. of digits of the number),

[this tells you why to look for greater digits from left side, while comparing two numbers. Ask yourself, how! ]