Question

which of the following is not perfect cupe?
a) 21
b)1000
c) 243
d) 1331​

Answer 1

Answer:

a) 21

Step-by-step explanation:

because 21 = 3 × 7 which is not a perfect cube

Answer 2

$\huge{QUESTION :-}$

which of the following is notwhich of the following is not perfect cube?

a) 21

b)1000

c) 243

d) 1331

$\huge{ANSWER:-}$

let's check it !!!

$\huge \red{c) \: 243}$

∴ 243 is not a perfect cube. ... Thus, the smallest required number to multiply 243 to make it a perfect cube is 3. (ii) We have 256 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2. Grouping the prime factors of 256 in triples, we are left over with 2 × 2.

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