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How many two digit prime numbers are there?
There are 21 two-digit prime 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.
How many two digit whole numbers are increased by 18 when their digits are reversed?
7 two-digit numbers.
How many two digit numbers are there?
There are 90 two-digit numbers... starting with 10 and ending with 99.
How many positive no.s with 2 digits?
All the numbers from 10 to 99 are positive 2 digit integers
How many 2 digit numbers have no 2 at all?
72. (with the range of two digit numbers being from 10 to 99).
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 two digit prime numbers are there?
There are 21 two-digit prime numbers.
How many numbers are there in all having two digit 89 and 90?
90
How many two-digit numbers has a digit sum equal to 5?
There are five such 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.
How many two digit whole numbers are increased by 18 when their digits are reversed?
7 two-digit numbers.
How many 4 digit numbers are possible with no two numbers being adjacent?
There are 2941 4-digit numbers such no two of its digits differ by 1.
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.
How many two-digit numbers are there in which the digit on the right is larger than the digit on the left?
36
How many two digit numbers are there in which the tens digit is greater than the ones digit?
There are 45 of them.
How many 2 digit numbers can be formed by adding two 1 digit numbers?
3
