Question

Choose the best answer: (5x1=5)

1. The cube root of 343 is ……...

(a) 4 (b) 5 (c) 6 (d) 7

2. Which of the following is a perfect cube? ……...

(a) 10000 (b) 243 (c) 743 (d) 27000

3. The volume of a cubical box is 64 cm2

. Its side is ……...

(a) 1 (b) 2 (c) 3 (d) 4

4. The value of (1

2

)

-5

is ……...

(a) 1

32

(b) −1

32

(c) 32 (d) -32

5. The exponential form of 32

x3-5

x36 is ……...

(a) 32

(b) 33

(c) 34

(d) 35

II Answer the following : (3x2=6)

1. Evaluate (5-1

x 2-1

) x 6-1

.

2. Write 0.000000564 in standard form

3. Find the cube root of 10648 by prime factorization method.

III Answer the following : (3x3=9)

1. Show that 0.001728 is a cube of a rational number.

2. Find the value of m when5

÷5

3

5

2

= 5

3

3. (a) Micron is equal to 1

10000

m. Write its standard form.

(b) What is the value of [ (-1)-1

]

-1

.

(c) The distance of the sun from the Earth is 149,600, 000, 000m. Express it in a standard ]

form.

*******​

Answer 1

Answer:

1. 7

Step-by-step explanation:

2. 243

3. 4

4.32

5.35

Answer 2

Answer:

1.

ans. 7

2.

ans.343

3.

ans. 4

4.

ans. -1

5.

ans. 2²×3³