0
To find the number of 3-digit numbers where the sum of the digits equals 8, we can denote the digits as (a), (b), and (c) (where (a) is the hundreds digit, (b) is the tens digit, and (c) is the units digit). The equation we need to solve is (a + b + c = 8) with the constraints (1 \leq a \leq 9) and (0 \leq b, c \leq 9). By changing variables (letting (a' = a - 1)), we can rewrite the equation as (a' + b + c = 7) with (0 \leq a' \leq 8). The number of non-negative integer solutions to this equation can be found using the stars and bars method, yielding a total of (36) valid combinations. Thus, there are 36 three-digit numbers whose digits sum to 8.
What else can I help you with?
How many 5-digit numbers have digits whose product is equal to 4?
There are 15 of them.
How many 3 digits whole numbers whose sum is 3?
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.
How many 1 digit numbers can make with 123 digits?
With 123 digits you can make 123 one-digit numbers.
How many 4 digits equals 19?
To find how many 4-digit numbers equal 19, we need to consider all combinations of four digits (ranging from 0 to 9) that add up to 19. However, since the maximum sum of four digits (9 + 9 + 9 + 9) is 36, the possible combinations are limited. There are no valid 4-digit numbers where the sum of the digits equals 19 while ensuring that the first digit is not zero. Therefore, the answer is that there are no valid 4-digit numbers that equal 19.
How many digits are in 1 - 39?
The numbers from 1 to 39 include both single-digit and double-digit numbers. There are 9 single-digit numbers (1 to 9) and 30 double-digit numbers (10 to 39). Therefore, the total number of digits is 9 (from single-digit numbers) + 60 (from double-digit numbers, as each has 2 digits) = 69 digits in total.
How many three digit numbers have the sum of their digits equal to 22?
21.
How many three digit numbers is average of three digits equal to 2?
21
How many 5-digit numbers have digits whose product is equal to 4?
There are 15 of them.
How many 3 digit numbers have the sum of their digits equal to 5?
002+002+001=005
How many 3 digits whole numbers whose sum is 3?
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.
How many 1 digit numbers can make with 123 digits?
With 123 digits you can make 123 one-digit numbers.
How many 5 digits numbers are there whose digits sum to 22?
There are 5460 five digit numbers with a digit sum of 22.
How many 4 digits equals 19?
To find how many 4-digit numbers equal 19, we need to consider all combinations of four digits (ranging from 0 to 9) that add up to 19. However, since the maximum sum of four digits (9 + 9 + 9 + 9) is 36, the possible combinations are limited. There are no valid 4-digit numbers where the sum of the digits equals 19 while ensuring that the first digit is not zero. Therefore, the answer is that there are no valid 4-digit numbers that equal 19.
How many digits are in 1 - 39?
The numbers from 1 to 39 include both single-digit and double-digit numbers. There are 9 single-digit numbers (1 to 9) and 30 double-digit numbers (10 to 39). Therefore, the total number of digits is 9 (from single-digit numbers) + 60 (from double-digit numbers, as each has 2 digits) = 69 digits in total.
How many three digit numbers equal 17?
There are no three-digit numbers that equal 17. In fact, there are no numbers with more or less than two digits that equal 17. In fact, in the whole infinite supply of numbers, there is only one single number that equals 17. That number is . . . . . . . 17 .
How many 3 digit numbers can be formed from the digits 357 with any digit repeated?
27 three digit numbers from the digits 3, 5, 7 including repetitions.
How many 4 digit numbers can be formed from digits 123456789?
5040 different 4 digit numbers can be formed with the digits 123456789. This is assuming that no digits are repeated with each combination.
