8th Standard Syllabus & Materials
8th Standard
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NEW8th Standard
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NEW8th Standard
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NEW8th Standard
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NEW8th Standard
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Published on: 15/06/2021
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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.
In a leadership election between two persons A and B, A wins by a margin of 192 votes. If A gets 58% of the total votes, find the total votes polled.
2.
If the price of Orid dhall after 20% increase is Rs. 96 per kg, find the original price of Orid dhall per kg.
3.
When a number is decreased by 25% it becomes 120. Find the number.
4.
If x % of 600 is 450 then, find the value of x.
5.
900 boys and 600 girls appeared in an examination of which 70% of the boys and 85%of the girls passed out in the examination. Find the total percentage of students who did not pass.
1.
Let the total votes polled be x.
Votes polled in favour in A = 58% of x =\(\frac { 58x }{ 100 } \)
Votes polled in favour of B = (100 − 58)% of x = 42% of x = \(\frac { 42x }{ 100 } \)
Given, Winning margin A− B = 192
That is, \(\frac { 58x }{ 100 } \)- \(\frac { 42x }{ 100 } \) = 192
⇒\(\frac { 16x }{ 100 } \)=192
x = 192 x \(\frac { 100 }{ 16 } \)
x = 1200 votes
2.
Let the original price of Orid dhall be Rs x.
New price aft er price of 20% increase = x +\(\frac { 20 }{ 100 } x=\frac { 120x }{ 100 } \)
Given that, 96 = \(\frac { 120x }{ 100 } \)
∴ x = \(\frac { 96\times 100 }{ 200 } \)
∴ Original price of Orid dhall per kg, x = Rs. 80
3.
Let the number be x.
x-\(\frac { 25 }{ 100 } x\) = 120
\(\frac { 100x-25x }{ 100 } \) = 120
\(\frac { 75x }{ 100 } \) = 120
x = \(\frac { 120\times 100 }{ 75 } \)
x = 160
4.
x% of 600 = 450
\(\frac { x }{ 100 } \)× 600 = 450
\(x=\frac { 450 }{ 6 } \)
x = 75
5.
Number of students who did not pass = 30% of boys + 15% of girls
=\(\frac { 30 }{ 100 } \) x 900 + \(\frac { 15 }{ 100 } \) x 600
= 270 + 90 = 360
∴ Percentage of students who did not pass =\(\frac { 360 }{ 1500 } \) x 100 = 24%
8th Standard Syllabus & Materials
8th Standard
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Tamilnadu Stateboard 8th Standard Subjects
Tamilnadu Stateboard Standards
