23.
The houses on Pine Street and most other streets are numbered so that even numbered homes are on one side of the street while odd numbered homes are on the other. If Pine Street has homes numbered from 1 to 140, it is likely that they are divided by odd and even numbers.
1
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.
There are 6804 such numbers.
27: 077,177,277,377,477,577,677,877,977,717,727,737,747,757,767,777,787,797
10293330201309i31841481389
The houses on Pine Street and most other streets are numbered so that even numbered homes are on one side of the street while odd numbered homes are on the other. If Pine Street has homes numbered from 1 to 140, it is likely that they are divided by odd and even numbers.
The pages of a book are numbered from 1 to 128. How many page numbers contain the digit 6?
8 contain the digit 9. Locker numbers are 9, 19, 29, 39, 49, 59, 69, 79.
There are 9000 4-digit numbers. 8*9*9*9 = 5832 of them do not contain a 5 The remaining 3168 contain a 5.
17
three digit numbers
-2
1
-5
There are 15180 combinations.
Any year that has a last digit of 0, 2, 4, 6 or 8.