Q: How many digit are there in ISSN?

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How many two digit numbers are there in which the tens digit is greater than the one’s digit ?

1

There are 210 4 digit combinations and 5040 different 4 digit codes.

There are 840 4-digit combinations without repeating any digit in the combinations.

The first 8 digit number is 10,000,000, the last is 99,999,999 which means there are 90,000,000 8 digit numbers

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8 digits

If you want to find further important information about ISSN, then you should check out their official website. Everything you need to know about ISSN is on their website.

It's an International Standard Serial Number. For instance, "TRON Reconfigured"'s ISSN number is "0891-5628".

International Standard Serial Number

international standard serial number

How many two digit numbers are there in which the tens digit is greater than the one’s digit ?

There are 45 of them.

36

Airo Research Journal Gwalior India

how many times gerater is the underlined digit 5 in 365,486,201 than the digit 5

Ten.

90