Find the number of numbers between 100 and 300 which begin and end with 1?
Answer:
there are 100 numbers from 100 to 199 that begin with 1 and 10 numbers between 200 to 300 that end with 1 (numbers of the kind 201, 211,..... 291)
So, the total number of numbers = 100 + 10 = 110
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