1.

Ramesh writes down the first 2018 positive integers in order 1,2,3,…,2018. Then for each power of 2 that appears, he crosses out that number as well as the number 1 greater than that power of 2. After he is done, how many numbers are not crossed out?

Answer»

Ramesh writes down the first 2018 positive integers in order 1,2,3,,2018. Then for each power of 2 that appears, he crosses out that number as well as the number 1 greater than that power of 2. After he is done, how many numbers are not crossed out?



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