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Question : Directions: When a number X is added to the double of its cube, the number 1467 is obtained. Find the value of X.

Option 1: 6

Option 2: 9

Option 3: 7

Option 4: 8


Team Careers360 21st Jan, 2024
Answer (1)
Team Careers360 24th Jan, 2024

Correct Answer: 9


Solution : Let the number be X
X + 2(X)3 = 1467

Let's check each option –
First option: 6; 6 + 2 × (6)3 = 6 + 2 × 216 
6 + 432 = 438
438 ≠ 1467 
Second option: 9; 9 + 2 × (9)3 = 9 + 2 × 729
9 + 1458 = 1467
1467 = 1467
Third option: 7; 7 + 2 × (7)3 = 7 + 2 × 343
7 + 686 = 693
693 ≠ 1467 
Fourth option: 8; 8 + 2 × (8)3 = 8 + 2 × 512
8 + 1024 =1032
1032 ≠ 1467 

So, the required number is 9. Hence, the second option is correct.
 

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