1, 3, 7, 19, 21, 57, 133, 399
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If you are wanting to add odd numbers to get 399, it won't work. If you are wanting to multiply to get 399, it is 19 x 21.
7x3 = 21 All numbers from 1-400 (399 total) that are factors of 21: 399/21 = 19
Oh, what a happy little question! You can multiply 19 and 21 together to get 399. Just like mixing the perfect colors on your palette, these two numbers come together beautifully to create 399. Remember, there are always infinite possibilities waiting to be discovered in the world of numbers.
8
Well, let's see here. To figure out how many times 31 goes into 399, we can simply divide 399 by 31. When we do that, we find that 31 goes into 399 about 12 times with a remainder of 7. Isn't that just a happy little reminder that numbers can be divided in different ways?