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When 16 is subtracted from 3 times a number, the result is 8. What is the cube of the original number?
Question

When 16 is subtracted from 3 times a number, the result is 8. What is the cube of the original number?

A.

343

B.

512

C.

125

D.

216

Correct option is B


Let the original number be x. According to the problem:
3x−16=8.
3x = 8 + 16,
3x = 24.
x = 8.
x3 = 83 = 512.

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