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How many two digit prime numbers are there?
There are 21 two-digit prime numbers.
Two digit numbers contain exactly one 4?
There are 17 of them.
How many two digit whole numbers are increased by 18 when their digits are reversed?
7 two-digit numbers.
How many two-digit whole numbers does not contain zero and any number greater than 1?
There is only one such number.
How many two digit numbers are there?
There are 90 two-digit numbers... starting with 10 and ending with 99.
How many 5 digit numbers contain exactly two 7 in them?
There are 6804 such numbers.
How many two-digit numbers do not contain the number 9?
There are 90 two digit numbers, 10 through 99. There are 18 two digit numbers containing a 9. They are 19, 29, 39, 49, 59, 69, 79, 89, and 90 through 99. Therefore, there are 72 two digit numbers that do not contain a 9.
How many three digit numbers contain at least two sevens?
27: 077,177,277,377,477,577,677,877,977,717,727,737,747,757,767,777,787,797
How many two digit prime numbers are there?
There are 21 two-digit prime numbers.
Two digit numbers contain exactly one 4?
There are 17 of them.
How many two-digit numbers has a digit sum equal to 5?
There are five such numbers.
How many two digit whole numbers are increased by 18 when their digits are reversed?
7 two-digit numbers.
How many two-digit whole numbers does not contain zero and any number greater than 1?
There is only one such number.
How may two digit-numbers contain the digit 4?
18 positive integers and 36 integers (negative and positive)
How many 2-digit numbers are there in which the one digit in greater than tens digit?
To determine the number of 2-digit numbers where the units digit is greater than the tens digit, we need to consider the possible combinations. The tens digit can range from 1 to 9, while the units digit can range from 0 to 9. If the units digit is greater than the tens digit, there are 36 possible combinations (9 choices for the tens digit and 4 choices for the units digit).
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 two-digit numbers are there in which the digit on the right is larger than the digit on the left?
36
