Exponents and Powers - Solutions 1
CBSE Class –VIII Mathematics
NCERT Solutions
CHAPTER - 12
Exponents and Powers (Ex. 12.1)
NCERT Solutions
CHAPTER - 12
Exponents and Powers (Ex. 12.1)
1. Evaluate:
(i)
(ii)
(iii) 



Ans. (i)
=



= 

(ii)


= 

(iii)
=



=
= 32

2. Simplify and express the result in power notation with positive exponent:
(i)

(ii)

(iii) 

(iv)

(v) 

Ans. (i)
=




=



(ii)


=



(iii)



=


=



=



(iv)



=
=
=





=



(v)



=
=




3. Find the value of:
(i)

(ii)

(iii) 

(iv)

(v) 

Ans.
(i)
=



=
=




=



(ii)



=
=




=



=



(iii)



=



=
= 4 + 9 + 16 = 29

(iv)



=


(v)



=



= 

4. Evaluate:
(i)
(ii) 


Ans. (i)



=



= 

(ii)



= 

5. Find the value of
for which 


Ans.






Comparing exponents both sides, we get






6. Evaluate:
(i)
(ii) 


Ans.
(i)



= 

(ii)



=



= 
=





= 

7. Simplify:
(i)

(ii) 

Ans. (i)




=
= 


(ii)




=



=



=
= 


= 1
1
3125 



= 3125