Saved Bookmarks
| 1. |
Which of the following are cubes of odd natural numbers? (i) 125, (ii) 343, (iii) 1728, (iv) 4096, (v) 32768, (vi) 6859 |
|
Answer» (i) 125 = 5 × 5 × 5 × 5 = 53 It’s a cube of odd natural number. (ii) 343 = 7 × 7 × 7 = 73 It’s a cube of odd natural number. (iii) 1728 = 26 × 33 = 43 × 33 = 123 It’s not a cube of odd natural number. As 12 is even number. (iv) 4096 = 212 = (26)2 = 642 Its not even a cube. (v) 32768 = 215 = (25)3 = 323 It’s a cube of odd natural number. As 32 is an even number. (vi) 6859 = 19 × 19 × 19 = 193 It’s a cube of odd natural number. |
|