(V) 46656 2. Find the smallest number by which each of the following numbers must be musica to obtain a perfect cube. (1) 243 (ii) 256 (ii) 72 (iv) 675 (v) 100 3. Find the smallest number by which each of the following numbers must be divided obtain a perfect cube. (1) 81 (i) 128 (ii) 135 (iv) 192 (v) 704 4. Parikshit makes a cuboid of plasticine of sides 5 cm, 2 cm, 5 cm. How many su cuboids will he need to form a cube?