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    				| 1. | Which of the following is a perfect cube number ? A) 25B) 64 C) 81 D) 100 | 
| Answer» Correct option is B) 64 Correct option is (B) 64 (A) 25 = 5 \(\times\) 5 (not a perfect cube number) (B) 64 = 4 \(\times\) 4 \(\times\) 4 \(=4^3\) is a perfect cube number. (C) 81 = 9 \(\times\) 9 (not a perfect cube number) (D) 100 = 10 \(\times\) 10 (not a perfect cube number) | |