Question

When the square of a number is subtracted from the cube of the same number, it becomes 100. Find the number. A.1 B. 2 C. 4 D. 5​

Answer 1

Answer:

The square of a natural number subtracted from its cube is 48. The number is:

Answer 2

(D). 5 is the correct answer.

we will try to solve this question by putting options and try to solve by using the trial and error method:

square of 5 =$(5)^{2}=25$

cube of 5=$(5)^{3} =125$

∴ cube of 5 - square of 5= 125-25=100.

Hence, the required number is 5.

HENCE, (D). 5 is the correct answer.