An easy problem
Number Theory
Level
2
Three of the four integers, found between 100 and 1000, with the property of being equal to the sum of the cubes of their digits are 153, 370, 407. What is the fourth number?
The answer is 371.
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1 solution
since 371 = 370+1 and 370 is in the list 371 = 370+1 = 3^3+7^3+1^3 so 371 is the fourth number