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Find the smallest number by which 1323 must be multiplied to get a perfect cube $. (1323 = 3 \times 3 \times 3 \times 7 \times 7.)$

Class 8Perfect CubesCubes and Roots

A3
B7
C21
D49

Step-by-Step Solution

1323 =

3^{3} \times 7^{2}

. We need one more 7 to make

7^{3}

. Multiply by 7:

1323 \times 7 = 9261 = 2 1^{3}

.

Answer: B) 7

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