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10 numbers in a billion
100 billion would be 100,000 million.
There are nine zeros in one billion.
There are 100 numbers.
Very round numbers are typically defined as integers that end with one or more zeros. Therefore, in the range of integers less than 1 billion (which is 1,000,000,000), the very round numbers are those that can be expressed as ( n \times 10^k ) where ( n ) is a non-zero integer and ( k ) is a non-negative integer. The very round numbers less than 1 billion include multiples of 10, 100, 1000, up to 1 billion itself, totaling 100 million such integers (from 1 to 999,999,999, including 10, 100, 1000, ..., 999,999,990). Thus, there are 100 million very round numbers below 1 billion.