There are an infinite number of numbers.
6
There are an many triangular numbers that are also square numbers. Simply put, the sum of two consecutive triangular number equals a square number. Examples include 1 and 36.
The number line from 1 to 10 includes 10 integers, but an infinite number of real numbers.
9999
There are 16 digits in a FedEx tracking number.
12
twelve
There are always 15 numbers in a FedEx tracking number. Ship items a lot, the first 11 numbers will not change each time you make a shipment. Only the last four will and you can even predict the tracking numbers by adding seven to a current tracking number.
Un normal all of the numbers
Check this control number 22324128
there are 387
8
8 digits
Western Union Money Transfer Control Numbers (MTCN #) are 100 numbers long.
8 Cifre. 89751642
Oh, dude, a Ria Money Tracking Number has like 16 digits. So, if you're counting, that's 16 numbers right there. But hey, who's really keeping track? It's not like you're gonna memorize all those digits anyway, am I right?