Question

1. Which of the following is correct? I. Cube of a negative number is always positive. II. Cube of a negative number is always negative. III. Cube of a negative number may be positive or negative. IV. All of the above 2. If the digit in one’s place of a number is 2, then the last digit of its cube will be: I. 2 II. 4 III. 6 IV. 8 3. If the digit in one’s place of a number is 3, then the last digit of its cube will be: I. 3 II. 6 III. 7 IV. 9 4. If the digit in one’s place of a number is 6, then the last digit of its cube will be: I. 6 II. 3 III. 2 IV. 8 5. The volume of a cubical box is 64 cm3. Which of the following is its side? I. 2 cm II. 4 cm III. 6 cm IV. 8 cm 6. Which of the following is a perfect cube? I. 10000 II. 243 III. 343 IV. 270000 7. If a number is doubled then which of the following is a correct statement? I. Its cube is two times the cube of the given number. II. Its cube is three times the cube of the given number. III. Its cube is six times the cube of the given number. IV. Its cube is eight times the cube of the given number. 8. Which of the following is equal to its own cube? I. -1 II. -2 III. -3 IV. -9 9. Which of the following is the cube root of 27000? I. 30 II. 300 III. 3000 IV. None of these 10. Which of the following is the cube root of -64/243? I. 7/4 II. -7/4 III. 4/7 IV. -4/7 Q11 The expansion of a3 is ___________ . (a) 3 × a (b) a+a+a (c) 3 × 3 × 3 (d) a × a × a Q12 What will be the unit digit of the cube of a number ending with 2 ? (a) 8 (b) 4 (c) 2 (d) 6 Q13 What will be the unit digit of the cube of a number ending with 4 ? (a) 4 (b) 6 (c) 2 (d) 8 Q14 What will be the unit digit of the cube of a number ending with 6 ? (a) 4 (b) 6 (c) 2 (d) 8 Q15 A cuboid has dimensions 5cm , 2cm, 5cm .How many such cuboid will be needed to form a cube ? (a) 20 (b) 10 (c) 5 (d) 2 Q16 How many cuboids of dimensions 15cm, 30cm ,15cm will be needed to form a cube ? (a) 15 (b) 4 (c) 30 (d) 5 Q17 729 is the value of _____________ . (a) 83 (b) 93 (c) 63 (d) 43 Q18 Which of the following is a perfect cube ? (a) 125 (b) 135 (c) 145 (d) 115 Q19 What is the volume of a cube whose edge is 2cm ? (a) 8 (b) 6 (c) 10 (d) 4 Q20 The symbol for cube root is __________ . Q21 The cube root of 512 is ________ . (a) 8 (b) 32 (c) 16 (d) 2 Q22 The value of cuberoot of 216 is ____ . (a) 8 (b) 7 (c) 6 (d) 3 Q23 Which of the following is true for any natural number n? (a) n2>n3 (b) n3>n2 (c) n2=n3 (d) none of these Q24 If the volume of a cube is 125 cm3 then what would be the length of its side? (a) 25 (b) 5 (c) 4 (d) 15

Answer 1

Answer:

3×3×3

93

16

6................

Answer 2

Answer:

what is this? so much to calculate