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# a nice question(believe me!)

there are 4 3 -digit numbers which are equal to the sum of the cubes of their digits three of them are: 153 ,370 and 407 which is the fourth one? hint: it is very easy!

Note by Snehdeep Arora
4 years, 11 months ago

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$$371$$

Since $$3^{3} + 7^{3} + 0^{3} = 370$$

Then $$3^{3} + 7^{3} + 1^{3} = 371$$

- 4 years, 11 months ago

correct!

- 4 years, 11 months ago

They are known as Armstrong Numbers in popular recreational math nomenclature.

- 4 years, 11 months ago