If you include 0000, ten thousand unique four digit codes are possible.
A four digit lock can have as it's combination any number between 0000 and 9999, or a total of 10,000 variations. Good luck guessing one.
If a leading zero is allowed... The first digit can be 0-9, ten possibilities. The second digit can be 0-9, ten possibilities. The third digit can be 0-9, ten possibilities. The fourth digit can be 3-9, 7 possibilities. So there are 10x10x10x7 = 7000 such codes.
Digit four represents ones.
There is 90 four digit palindromes.
When no fifth-digit subcategory codes are in that category
Five digit- four digit
subclassification
If you include 0000, ten thousand unique four digit codes are possible.
For a four-digit ID code, you would have 10x10x10x10, so 10000 different codes. With a five-digit and one letter ID code, you have 10x10x10x10x10x26 or 2,600,000 different codes. So there are 2,600,000-10,000 more, or 2,590,000 more codes.
11357 is the seven digit code. The next four digits depends on the route.
Zip codes are American postal codes designed to "zip" the mail faster. They consist of a 5 digit number and then a plus four number.
A four digit lock can have as it's combination any number between 0000 and 9999, or a total of 10,000 variations. Good luck guessing one.
I have known some of the three-digit codes for over 20 years, such as ALT+171 for ½, ALT+234 for Ω, ALT+246 for ÷, etc. Although I had become aware that there are now four digit ALT codes, I have not yet begun to familiarize myself with any of them. However, just as the number of three-digit codes, 256, is a three-digit power of two, I imagine the number of four-digit codes is a four-digit power of two, which would be either 1024, 2048, 4096 or 8192. Since the example given is greater than 5000, I'm guessing the total is 8192, unless codes of more than four digits exist. If you open the Character Map application that comes with Windows and click on a character, you get its code in hex at the bottom of the window.
Depending on the remote you have some remotes ask for a three digit codes some four and some a five digit codes is need. I have found out 02429 works for some remotes that need five digit codes. 2288 will work for some remotes that need four digit codes. Also, for those of you wanting to use a universal remote, I found after some testing that this uses the same code as one of the RCA codes (the 9th or 10th one) that Verizon Fios list of codes. RCA model L32HD31 has the same IR codes as this TV for some remotes. DirecTV remote control code is recognized as RCA TV, It has a sequence of 35 possibilities to try. Hope this helps. Guy6
If a leading zero is allowed... The first digit can be 0-9, ten possibilities. The second digit can be 0-9, ten possibilities. The third digit can be 0-9, ten possibilities. The fourth digit can be 3-9, 7 possibilities. So there are 10x10x10x7 = 7000 such codes.
We would need to know the specific address. A five-digit ZIP code typically includes hundreds or thousands of nine-digit ZIP+4 codes, since that is the whole point of ZIP+4 codes.