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0, 1, 2, 3 and 4
It means that you are talking about numbers that have more than one digit.
2, 3, 5, and 7 are the only one-digit prime numbers.
None. 3 digit numbers are not divisible by 19 digit numbers.
With 123 digits you can make 123 one-digit numbers.
15
only 2
0, 1, 2, 3 and 4
90,000,000
When the lower digit is greater than the upper one.
I believe that the numbers One and Nine fit the bill as they would be 1x9= 9 and 1+9=10.
42
The ratio of the number of one-digit prime numbers to the number of one-digit composite numbers is one to one. The one-digit prime numbers are 2, 3, 5, and 7. The one-digit composite numbers are 4, 6, 8, and 9. Therefor, the ratio is 4:4, which simplifies to 1:1.
How many two digit numbers are there in which the tens digit is greater than the one’s digit ?
The answer will depend on how many digits there are in each of the 30 numbers. If the 30 numbers are all 6-digit numbers then the answer is NONE! If the 30 numbers are the first 30 counting numbers then there are 126 combinations of five 1-digit numbers, 1764 combinations of three 1-digit numbers and one 2-digit number, and 1710 combinations of one 1-digit number and two 2-digit numbers. That makes a total of 3600 5-digit combinations.
It means that you are talking about numbers that have more than one digit.
10E7 (this is amount of numbers currently present within one area code) 10E8 (we want to add one more digit to all the phone numbers in one area code) Now we do the math: 10E8 - 10E7 = 90,000,000 new numbers could potentially be added I AM CHUCK NORRIS FEAR ME MORTALS!!! MO HA HA HA HA THIS QUESTION IS IRRELEVALENT. WIKIPEDIA LETS ME POST THIS S---.