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Question : Directions: If the sum of a number, its square and, its cube is 584, then what is the number?

Option 1: 8

Option 2: 6

Option 3: 7

Option 4: 9


Team Careers360 7th Jan, 2024
Answer (1)
Team Careers360 16th Jan, 2024

Correct Answer: 8


Solution : Let the number be X
According to the question –
X + X2 + X3 = 584

Let's check each option –
First option: 8; 8 + (8)2 + (8)3 = 8 + 64 + 512 = 584
584 = 584
Second option: 6; 6 + (6)2 + (6)3 = 6 + 36 + 216 = 258
258 ≠ 584
Third option: 7; 7 + (7)2 + (7)3 = 7 + 49 + 343 = 399
399 ≠ 584
Fourth option: 9; 9 + (9)2 + (9)3 = 9 + 81 + 729 = 819
819 ≠ 584

So, the number is equal to 8. Hence, the first option is correct.

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