Exponents Class - VIII

 $\left(-\frac{1}{4}\right)^{-3}\times\left(-\frac{1}{4}\right)^{-2}$  Simplify :

• -1/1024

• -1024

• 1024

• 1/1024

 $\left(2^{-1}\times5^{-1}\right)^{-1}\div4^{-1}$  

• 26

• 34

• 40

• 85

 $\left(\frac{1}{2}\right)^{-2}+\left(\frac{1}{3}\right)^{-2}+\left(\frac{1}{4}\right)^{-2}$  

• 45

• 21

• 29

• 37

By what number should (-1/6) be multiplied so that the product becomes 1/9.

• 8/9

• 7/6

• 2/3

• -2/3

 $5^{\left(2m+1\right)}\div5^2=5^3$  Find the value of m.

• 1

• 2

• 3

• 4
  
  

Write 1450000000 in standard form .

• $1.45\times10^{10}$

• $1.45\times10^7$

• $1.45\times10^9$
  

• $145\times10^9$

 $1.896\times10^5$  Write the following in the usual form.

• 189600

• 189600000

• 1896

• 1896000

Write the following in standard form :

0.00000000684

• $6.84\times10^{-10}$

• $6.84\times10^{-11}$

• $684\times10^{-9}$

• $6.84\times10^{-9}$

 $5.123\times10^{-3}$  Write the following in usual form:

• 0.05123

• 0.0005123

• 0.005123

• 0.5123

 $\left[\left\{\left(\frac{1}{2}\right)^2\right\}^{-2}\right]^{-1}$  Evaluate :

• 1/16

• 1/32

• 16

• 32