There are 13 combinations.
36
10
To create a combination of three-digit numbers from the digits 1 to 9 that yields the same sum, you can select different sets of three digits that add up to the same total. For example, the combinations (1, 2, 3) and (1, 4, 2) both sum to 6. You can then form three-digit numbers using these combinations, such as 123 and 132, which will still sum the same. The key is to ensure that the chosen digits in each combination always add up to the same total.
Because they're in multiples of three - a quick way to tell if a number is a multiple of three is to add up the digits and see if the digits add up to a multiple of three e.g 576, 5+7+6=18, 1+8=9, 9 is a multiple of three
992
36
10
Three digits can't possibly add up to 900. The largest possible sum of 3 digits is (9 + 9 + 9) = 27.
There are a variety of three digits that add up to 25. Examples include 9, 8 and 8.
Because they're in multiples of three - a quick way to tell if a number is a multiple of three is to add up the digits and see if the digits add up to a multiple of three e.g 576, 5+7+6=18, 1+8=9, 9 is a multiple of three
992
No, because if you add the three digits together, you get 7 which isn't divisible by 3
yes 72/3 equals 24. an easy way to find out if a number is divisible by three is to add up all the digits. if the sum of the digits is divisible by three, the whole number is divisible by three.
Assuming you mean digits and not didgets, the answer is 6.
22
1.5 and 1.5 easy peasy
12