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How many 5 digit numbers contain exactly two 7 in them?
There are 6804 such numbers.
How many seven digit numbers contain the number seven at least once?
To find the total number of seven-digit numbers that contain the number seven at least once, we can use the principle of complementary counting. There are a total of 9,999,999 seven-digit numbers in total. To find the number of seven-digit numbers that do not contain the number seven, we can count the number of choices for each digit (excluding seven), which is 9 choices for each digit. Therefore, there are 9^7 seven-digit numbers that do not contain the number seven. Subtracting this from the total number of seven-digit numbers gives us the number of seven-digit numbers that contain the number seven at least once.
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 10 digit palindromic numbers are there?
well, i think if you use this you can find out. A = 1-9 ,B = 0-9 , C = 0-9 , D = 0-9 , E = 0-9 for 2digit numbers = A A for 3 digit numbers = A B A for 4 digit numbers = A B B A and so on till you get to for 8 digit numbers = A B C D D C B A for 9 digit numbers = A B C D E D C B A and last for 10 digit number = A B C D E E D C B A this should work...
How many whole numbers from 1 to 100 contain the digit 3 exactly once?
18
How many 2 digit numbers contain the digit 4?
17
How many 4 digit numbers contain the digit 5?
There are 9000 4-digit numbers. 8*9*9*9 = 5832 of them do not contain a 5 The remaining 3168 contain a 5.
How many a 2 -digit numbers contain the digit 4?
-2
How many 2-digit numbers contain the digit 7 only once?
-5
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.
How many 3 digit numbers contain the digit 2 at least once?
252
How many 5 digit numbers contain exactly two 7 in them?
There are 6804 such numbers.
When The pages of a book are numbered from 1 to 128 How many page numbers contain the digit 6?
The pages of a book are numbered from 1 to 128. How many page numbers contain the digit 6?
How many three digit numbers contain no 7's?
648
How many 3 digit numbers contain the digit 8?
-5
How many three digit numbers contain any odd digits?
874
How many 3 digit numbers are there that contain at least 1 seven?
252
