KSEEB Solutions for Class 8 Maths Chapter 10 Exponents Ex 10.5

Students can Download Maths Chapter 10 Exponents Ex 10.5 Questions and Answers, Notes Pdf, KSEEB Solutions for Class 8 Maths helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.

Karnataka Board Class 8 Maths Chapter 10 Exponents Ex 10.5

Question 1.
Simply
i.  68x53
ii. \(\frac{(15)^{-3} \times(-12)^{4}}{5^{-6} \times(36)^{2}}\)
iii. \(\frac{(0.22)^{4} \times(0.222)^{3}}{(0.2)^{5} \times(0.2222)^{2}}\)
Answer:
KSEEB Solutions for Class 8 Maths Chapter 10 Exponents Ex. 10.5 1
KSEEB Solutions for Class 8 Maths Chapter 10 Exponents Ex. 10.5 2
KSEEB Solutions for Class 8 Maths Chapter 10 Exponents Ex. 10.5 3

Question 2.
Is ∴ \(\frac{\left(10^{4}\right)^{3}}{5^{13}}\) an integer? Justify your answer.
Answer:
KSEEB Solutions for Class 8 Maths Chapter 10 Exponents Ex. 10.5 4

Question 3.
Which is larger (100)4 or (125)3?
Answer:
(100)4 = [(10)2]4 = 102×4 =108
= (2 x 5)8 = 28 x 58
(125)= (53)3
= 53×3 = 59
We know that 5 x 58 = 59
In the exponent 28 x 58, 28 > 5
∴ 28 x 58 > 5 x 5s
∴ (100)4 > (125)3

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