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What are the different combinations of three digit numbers using 0-9?
9
How many three digit numbers have the sum of their numbers equal to 5?
30,25,15,20, or 10.
How many number combinations are possible with the same three numbers?
Oh, dude, you're making me do math now? Alright, so if you have three numbers and you're asking how many combinations you can make with those three numbers, it's like a little math puzzle. Each number can be used multiple times, so it's like a little party for those numbers. The total number of combinations you can make with three numbers is 27. That's like having 27 different outfits to choose from for a night out, but with numbers.
How many three-digit numbers have the hundreds digit equal to 4 and the units digit equal to 5?
10 You can only have one choice, the number 4 as the hundred digit and also one choice, the number 5 as the units digit. However, you can have any integer from 0-9 as the hundreds digit. The number of combinations is thus 1 x 10 x 1 = 10.
What three prime numbers equal 18?
Three possible combinations: 17+1, 13+5 and 7+11.
