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. 6^{8}x5^{3}

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:

Question 2.

Is ∴ \(\frac{\left(10^{4}\right)^{3}}{5^{13}}\) an integer? Justify your answer.

Answer:

Question 3.

Which is larger (100)^{4} or (125)^{3}?

Answer:

(100)^{4} = [(10)^{2}]^{4} = 10^{2×4} =10^{8}

= (2 x 5)^{8} = 2^{8} x 5^{8}

(125)^{3 }= (5^{3})^{3}

= 5^{3×3} = 5^{9}

We know that 5 x 5^{8} = 5^{9
}In the exponent 2^{8} x 5^{8}, 2^{8} > 5

∴ 2^{8} x 5^{8} > 5 x 5^{s
}∴ (100)^{4} > (125)^{3}