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On the U.S. interstate system, even numbers indicate East/West routes; Odd numbers represent North/South routes; 3 number routes generally indicate belt-routes or local alternates.

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Q: What is the significance of the odd second digit in highways?
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Do the US interstate highways that end in odd numbers carry travelers from east to west?

No, odd numbered highways go North and South. Even numbered highways go East and West. Three digit highways are bypasses around cities.


What is the second smallest two- digit number that has an odd number of factors?

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Look at the last digit. If the last digit of a number is even, the whole number is even. If the last digit is odd, the number is odd.


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Do all phone numbers end in a odd digit?

No, my second to last phone number ended in 3836.


How do you turn two digit numbers in to tens?

If the second digit is 1, 2, 3 or 4 replace it by 0. If the second digit is 6, 7, 8 or 9 replace it by 0 and increase the first digit by 1. If the second digit is 5, then, if the first digit is even, replace the second digit by 0, if the first digit is odd, replace the second digit by 0 and increase the first digit by 1. Many people will require that 5 as the second digit should be treated the same as 1-4. This ignores the upward bias introduced and IEEE 754 standard for rounding.


Which is the smallest 9 digit odd number?

Which is the smallest nine digit odd number?


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