Question

Find the smallest number by which the number 128 must be multiplied to

obtain a perfect cube.

(a) 2 (b)4 (c) 3 (d) 8.​

Answer 1

Answer:

Here, the prime factor 2 is not grouped as a triplet. Hence, we divide 128 by 2, so that the obtained number becomes a perfect cube. Thus, 128 ÷ 2 = 64 = 43 is a perfect cube. Hence the smallest number by which 128 should be divided to make a perfect cube is 2.

Answer 2

Answer:

Your correct answer is option B which is 4 .

Step-by-step explanation:

4 must be multiplied to 128 to obtain perfect cube .