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To make the list of two-digit numbers with digits that add up to 10, first write the pairs of single-digit integers that add up to 10. They are (1,9), (2,8), (3,7), (4,6), (5,5). Then recognize that each of these pairs of numbers, except 5, can be combined in two different ways to make two-digit numbers that satisfy the problem.
19 and 91
28 and 82
37 and 73
46 and 64
55
So there are nine two-digit numbers with digits that add up to 10.
What else can I help you with?
How many two-digit numbers have digits that add to thirteen?
Assuming you mean digits and not didgets, the answer is 6.
How many three figure numbers have digits that add up to seven?
36
How many numbers between 0 and 10000 will give you a sum of 10 if you add the digits of a number?
20 number
How do you divide by double digits?
add numbers below to each number at the top
What 2-digit prime number has a sum of 10 when you add up its digits?
Two-digit prime numbers whose digits add up to 10 are:193773
How many two-digit numbers have digits that add to thirteen?
Assuming you mean digits and not didgets, the answer is 6.
How many three figure numbers have digits that add up to seven?
36
How many 2 numbers add to 15?
17
How many numbers between 0 and 10000 will give you a sum of 10 if you add the digits of a number?
20 number
How many of these numbers are multiples of 3?
Multiples of 3 are easy to identify. Their digits add up to a multiple of 3.
Which three digits numbers do the digits add up to 25?
There are a variety of three digits that add up to 25. Examples include 9, 8 and 8.
How many three digit numbers have digits that add up to zero?
None. The only way for it to be possible would be 3 zeros which is not considered a 3 digit numbers.
How do you divide by double digits?
add numbers below to each number at the top
What 2-digit prime number has a sum of 10 when you add up its digits?
Two-digit prime numbers whose digits add up to 10 are:193773
How many numbers are less than 64 whose digits add to 8 and are even?
72
What numbers between 35 and 49 which have digits that add up to 12?
39 and 48
What numbers can you add to 50 eg 24 1 25?
There are infinitely many possible sets.For example, using 2 numbers,25 + 25, 24 + 26, 23 + 27, ... 1 + 49, 0 + 50, -1 + 51, -2 + 52, ....Then you can look at numbers with 1 digit after the decimal point:24.9 + 25.1, 24.8 + 25.2, and so onNext you can look at numbers with 3 digits, 4 digits, ... , infinitely many digits after the decimal point.Then move to triplets of numbers, sets of 4 numbers, 5, 6, ... infinitely many numbers.
