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The sum is 22 times the sum of the three digits.
The LCM of 5 and 9 is 45 and so 45*22 = 990
10, 12, 14, 16, 18, 20, 22 and just keep adding two until you get to 98.
Let's count them out... 12 20 21 22 23 24 25 26 27 28 29 32 42 52 62 72 82 92 Whew... that makes 18 two-digit numbers that have a "2".
300