8th Standard Syllabus & Materials
8th Standard
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NEW8th Standard
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NEW8th Standard
Tamilnadu 8th Standard роХрогро┐родроорпН роОрогрпНроХро│рпН Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
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NEW8th Standard
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NEW8th Standard
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Published on: 15/06/2021
QB365 provides detailed and simple solution for every book back questions in class 8 Maths subject.It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 8th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
Find x so that (-7)x + 2 X( - 7) 5 = (-7) 10
2.
Simplify;\(\sqrt { \cfrac { 98 }{ 162 } } \)
3.
Write the following scientific notations in standard form: Lights travels at 1.86 \(\times\)105miles per second.
4.
Combine the scientific notations:(3.7 x 10-5)(2 x 10-3)
5.
Simplify and write the answer in exponential form:
\(\left( -3 \right) ^{ 4 }\times \left( \cfrac { 5 }{ 3 } \right) ^{ 4 }\)
1.
(-7)x + 2 x(-7)5 = (-7)10
(-7)x + 2 + 5 = (-7)10
Since the bases are equal, we equate the exponents and get
x + 7 = 10
x = 10 - 7 = 3
2.
Remembering the rule,\(\sqrt { \cfrac { a }{ b } } =\cfrac { \sqrt { a } }{ \sqrt { b } } \left( b\neq 0 \right) \)
\(\sqrt { \cfrac { 98 }{ 162 } } =\sqrt { \cfrac { 2\times 49 }{ 2\times 81 } } =\sqrt { \cfrac { 49 }{ 81 } } =\sqrt { \cfrac { { 7 }^{ 2 } }{ { 9 }^{ 2 } } } =\cfrac { 7 }{ 9 } \)
3.
Light travels at 1.86 \(\times\) 105miles per second
= 186000 miles per second
4.
(3.7 x 10-5)(2 x 10-3) = 7.4 x 10-8
5.
\(\left( -3 \right) ^{ 4 }\times \left( \cfrac { 5 }{ 3 } \right) ^{ 4 }={ 3 }^{ 4 }\times \cfrac { { 5 }^{ 4 } }{ { 3 }^{ 4 } } ={ 5 }^{ 4 }=625\)
8th Standard Syllabus & Materials
8th Standard
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NEW8th Standard
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NEW8th Standard
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Tamilnadu Stateboard 8th Standard Subjects
Tamilnadu Stateboard Standards
