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How many 2 digit numbers have the factors?
All of them.
How many two digit numbers are not multiples of 2?
All of the odd numbers between 11 and 99 inclusive are two digit numbers that are not multiples of 2. There are 45 of them.
How many times digit 1 is used to make all 2 digit numbers?
19 times10,11 (is 2),12,13,14,15,16,17,18,19,21,31,41,51,61,71,81 and 91
How many 5 digit combos in 30 numbers?
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.
What is the ratio of 1 digit numbers to 2 digit numbers?
There is no such ratio that applies for all single-digit and double-digit integers.
How many a 2 -digit numbers contain the digit 4?
-2
How many such 4 digit numbers are there in which the sum of all the digits is 2?
The answer depends on what is implied by "such".
How many 2 digit numbers contain the digit 4?
17
How many 2 digit descending numbers are there?
There are 45 such numbers.
How many 2-digit numbers contain digit 1?
1
How many 2-digit numbers contain the digit?
It would help to know which digit. 0 appears in 9 numbers and each of the others in 18 numbers.
What is the two-digit natural number?
There is no THE two-digit natural number because there are many of them. 10, 11, 12, .. 99 are all 2-digit natural numbers.
