Question

$343 = 7^{3}$, $512 = 8^{3}$, $1331 = 11^{3}$ are cubes of primes ($7, 11$) or $8$, but $729 = 9^{3}$ is the cube of the composite number $9$ — alternatively, all others are cubes of prime powers of a single prime, while $9 = 3^{2}$ is composite. / $343=7^{3}$, $512=8^{3}$, $1331=11^{3}$; केवल $729=9^{3}$ भाज्य संख्या $9$ का घन है। Option (c) is the trap of picking the largest number as the odd one out.