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Important questions for Exponents Class 8 Chapter 12 CBSE




In this page we have Important questions for exponents & power Class 8 maths Chapter 12 CBSE . Hope you like them and do not forget to like , social share and comment at the end of the page.
Question 1
Evaluate
  1. 2-2
  2. (-2)-2
  3. (3/2)-5

Question 2
Simplify and express the result in power notation with positive exponent.
(i) (-2)5 ÷ (-2)4
(ii) (1/2)2 × (2/5)2
(iii) (-5)2 × (3/5)

Question 3
Find the value of.
(i)(40 + 4-1) × 22
(ii)(3-1 × 9-1) ÷ 3-2
(iii)(11-1 + 12-1 + 13-1)0

Question 4
Find the value of x here
$( \frac {11}{9})^3 \times (\frac {9}{11})^6 = (\frac {11}{9})^{2x-1}$


Question 5
Find the value of m for which 2m ÷ 2-4 = 45

Question 6
Express the following numbers in standard form.
(i) 0.0000000015
(ii) 0.00000001425
(iii) 102000000000000000

Question 7
Express the following numbers in usual form.
(i) 34.02 x 10-5
(ii) 9.5 x 105
(iii) 9 x 10-4
(iv) 2.0001 x 108

Question 8
Solve for the variables
(i) $\frac {1}{y^{-5}} = 32$
(ii) $ (\frac {1}{7})^3 \div (\frac {1}{7})^8 = 7^n$
(iii) $ \frac {3^x .3}{3^{2x+1}} = 27$

Question 9
Find the Multiplicative inverse of
(i) $3^{25}$
(ii) $4^{-3}$
(iii) $(\frac {2}{3})^{-2}$

Question 10
Simplify the following
(i) $1 + \left [ \left ( \frac{1}{3} \right )^{-3} - \left ( \frac{1}{2} \right )^{-3} \right ] \div 38$
(ii) $\frac {1}{1 + p^{a-b}} + \frac {1}{1 + p^{b-a}}$

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