Question

If A is the least positive 5-digit integer with nonzero digits, none of which is repeated. and B is the greatest of such positive integers, then B - A A. 2,468B. 66,666 C.86,420 D.86,424

Answer 1

We will have the following:

First, the smallest 5-digit integer with nonzero digits, none of which is repeated is:

$A=12345$

Second, the greatest 5-digit integer with nonzero digits, none of which is repeated is:

$B=98765$

Finally, we would have:

$B-A=98765-12345\Rightarrow B-A=86420$

So, the solution is 86 420. [Option C]