SOLUTION: My greatest digit is 9. But im less than 900. I am one more than a multiple of 10, my digits equal 12. What am i ?

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Question 229302: My greatest digit is 9. But im less than 900. I am one more than a multiple of 10, my digits equal 12. What am i ?
Answer by solver91311(24713) About Me  (Show Source):
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Greatest digit is 9, but less than 900, so at most the number can have three digits, and the hundreds digit cannot be 9. One more than a multiple of 10. All multiples of 10 end in 0, so one more must end in 1. That means that the 1s digit is 1, and since 1 plus 9 is only 10, we need another digit, namely a 2 to make the sum of the digits be 12. The 2 has to go in the 100s place, the 9 in the 10s place, and the 1 in the 1s place.

I am 291.


John