Say how many numbers weld of three numbers?

Let's solve a few simple problems before going to the main puzzle. I told you, the sum of two numbers is 82. If the numbers are doubled by adding 5 to each of the two, how much will the sum of their sum be? The answer is very easy to get out. Whatever number two, I'm adding them (5 + 5) = 10 After adding new numbers twice, the sum is surely greater than the previous sum (10 * 2) = 20 That's the answer.

See another funny puzzle. If the number of two numbers is 30 and the product (-400), then how many numbers are there? To solve this problem we must first think, since the product is negative, so a number must be negative. Their product is noticeable, that is, two null at the end of the number. Then the number of the two should be zero in each unit of the unit. It was easy to redeem the puzzle. Because 400 = (40 * 10) or 400 = (20 × 20). Only 400 = (40 * 10) of these are applicable for our answer. Number two 40 and (-10). Their product = (-400) and sum (40-10) = 30
This week's puzzle
Say, just how many numbers in the 3 digit numbers?
Last week's puzzle answers
The puzzle was such that if the sum of two numbers is two, then the smallest sum is of two numbers and the largest sum of any two numbers?
Answer:
Numbers are the smallest sum of 10 and 11, and the largest sum of 49 and 50. The biggest sum can be further. Such as (89 + 10), (79 + 20) etc.
The answer to this puzzle is low. But everyone gave the correct answer. Thank you all.
How did I get the answer?
At first I thought, the smallest number of two digits is 10 and 11. Their sum is two figures. So the sum of these must be the smallest sum. Second, the largest number of two digits is 99. So we have to find two numbers of which sum of 99 It's easy to find out. A number (99-1) / 2 = 49 and the other (99-49) = 50 Again (89 + 10), (79 + 20) etc. can also be.