Question

Q1.
Find which of the following is not a perfect cube?
(a) 121
(b) 1728 (c) 2744
(d) 256
(e) 3375
(f) 4000​

Answer 1

Answer:

4000

121

3375

these aren't perfect cubes

Answer 2

Answer:

The numbers which are not perfect cubes because we cannot write them as cube of any number.

d) 256  f) 4000

Step-by-step explanation:

Perfect cube:

• The result of multiplying three identical numbers together is a perfect cube.
• To determine whether a number "N" is a perfect cube or not, we determine whether an integer produces the number "N" when it is multiplied by itself three times.
• If so, the cube is flawless. Some instances of perfect cubes are 1, 8, 27, and 64. You can make a perfect square by multiplying a number by itself. It is not the same as a perfect cube.
• Positive and negative numbers are both acceptable for perfect cubes.
• For instance, since it is the result of multiplying -4 three times, -64 is a perfect cube.

   In the given numbers following are the perfect cubes

       a) 121 = 3³

       b) 1728 =  12³

       c) 2744 = 14³

        e) 3375 = 15³

The numbers which are not perfect cubes because we cannot write them as cube of any number.

d) 256  f) 4000

Know more about  Exponents:

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