Harold and cindy both found the sum of two 4-digit numbers, but their results were not the same. if kent made an error of addition by one in the tens column and cindy's result was correct, what was the difference between the larger result and the smaller result?

The difference between the larger result and the smaller result was 10.

Suppose the 4 digits numbers are abcd and pqrs

Here, 1st Number is = 1000*a + 100*b + 10*c + d
and 2nd Number is = 1000*ap + 100*q + 10*r + s

Then, since Kent made an error if 1 in tens columns and Harold added it correct, so the difference will be of 10 points.