Answer :

Subtract 170 from 410.
i.e 
410 - 170
= 240

So, when you count from 170 to 410, you get 240

Solution:

We need to count from 170 - 410

We have many number of way to count from 170 - 410

But we will show a way only.

2 times count by 100 and 4 times count by 100

170 + 100 = 270                 (Count by 100)

270 + 100 = 370                (Count by 100)

370 + 10 = 380                 (Count by 10)

380 + 10 = 390                 (Count by 10)

390 + 10 = 400                  (Count by 10)

400 + 10 = 410                   (Count by 10)

From 170 count 2 times 100 and 4 times 10 to get 410