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On one side of Long Street the houses are numbered with the consecutive odd numbers from $$1$$ to $$19$$. On the other side of that street, the houses are numbered with the consecutive even numbers from $$2$$ to $$14$$. How many houses are there on Long Street? (2006 Math Kangaroo Problem, Level 3-4, Question \#9) 
Overseas Competition->Knowledge Point->Number Theory Modules
Odd numbers from $$1$$ to $$19$$: $$1, 3, 5, 7, 9, 11, 13, 15, 17, 19$$  Even numbers from $$2$$ to $$14$$: $$2, 4, 6, 8, 10, 12, 14$$  $$10+7=17$$ 