What would you get when the sum of largest 4-digit number and the smallest 5-digit number is added to the difference of the smallest 6-digit number and the largest 5-digit number?

The correct option is A 200000
Here,
The largest 4-digit number = 9999
The smallest 5-digit number = 10000
Sum = 9999 + 10000 = 19999

Also,
The smallest 6-digit number = 100000
The largest 5-digit number = 99999
Difference = 100000 - 99999 = 1

Thus, the required sum = 19999 + 1 = 20000
Hence, option B is correct.