Arrange the following numbers in ascending order:

304, 340, 34, 4503, 43, 430

Given, 304, 340, 34, 4503, 43, 430

The number of digits in each number:

304, 340, 430 → 3 digits

34, 43 → 2 digits

4503 → 4 digits

The 2-digit numbers are smaller than the 3-digit numbers, which are smaller than the 4-digit number.

Comparing the 2-digit numbers 34 and 43: 3 < 4, so 34 < 43.

Comparing the 3-digit numbers 304, 340 and 430:

The hundreds digit is 3, 3, 4 respectively. So 430 > 340 > 304 (after also comparing 304 and 340 at the tens digit: 0 < 4).

Hence, the ascending order is: 34 < 43 < 304 < 340 < 430 < 4503.