216, 343
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A cube number is the result of multiplying a number by itself twice. To find a cube number between 200 and 400, we can calculate the cube root of these numbers. The cube root of 200 is approximately 5.848, and the cube root of 400 is approximately 7.368. Therefore, the cube number between 200 and 400 is 216, which is 6 cubed (6 x 6 x 6).
Take the cubic root of 200, then round that upwards, to the nearest integer. Then cube that number again.
it is 343
Any number bigger than 7.37 and smaller than 8.43 will do that. There are an infinite number of them.
9 12 34
The cube of 9 is 729, as a few moments of calculation would have shown you.
How about 73 = 343 or 63 = 216