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Secondary School (English Medium) (5 to 8) इयत्ता ८ - CBSE Question Bank Solutions for Mathematics

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Mathematics
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Find the cube root of the following rational number \[\frac{- 125}{729}\] .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the cube root of the following rational number \[\frac{10648}{12167}\] .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

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Find the cube root of the following rational number \[\frac{- 19683}{24389}\] .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the cube root of the following rational number  \[\frac{686}{- 3456}\] .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the cube root of the following rational number \[\frac{- 39304}{- 42875}\] .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the cube root of the following rational number 0.001728 .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the cube root of the following rational number 0.003375 .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the cube root of the following rational number 0.001 .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the cube root of the following rational number  1.331 .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Evaluate of the following

\[\sqrt[3]{27} + \sqrt[3]{0 . 008} + \sqrt[3]{0 . 064}\]

 

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Evaluate of the following

\[\sqrt[3]{\frac{729}{216}} \times \frac{6}{9}\]

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Evaluate of the following

\[\sqrt[3]{\frac{0 . 027}{0 . 008}} \div \sqrt[]{\frac{0 . 09}{0 . 04}} - 1\]

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Evaluate of the following

\[\sqrt[3]{0 . 1 \times 0 . 1 \times 0 . 1 \times 13 \times 13 \times 13}\]

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Evaluate of the following

\[\sqrt[3]{1000} + \sqrt[3]{0 . 008} - \sqrt[3]{0 . 125}\]

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Explain the concept of direct variation.

 
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

Which of the following quantities vary directly with each other?
(i) Number of articles (x) and their price (y).
(ii) Weight of articles (x) and their cost (y).
(iii) Distance x and time y, speed remaining the same.
(iv) Wages (y) and number of hours (x) of work.
(v) Speed (x) and time (y) (distance covered remaining the same).
(vi) Area of a land (x) and its cost (y).

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

In which of the following tables x and y vary directly?

(i)

a 7 9 13 21 25
b 21 27 39 63 75

(ii)

a 10 20 30 40 46
b 5 10 15 20 23


(iii)

a 2 3 4 5 6
b 6 9 12 17 20


(iv)

a 12 22 32 42 52
b 13 23 33 43 53
[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

Fill in the blank in of the following so as to make the statement true:

Two quantities are said to vary......... with each other if they increase (decrease) together in such a way that the ratio of the corresponding values remains same.

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

Fill in the blank in of the following so as to make the statement true:

x and y are said to vary directly with each other if for some positive number k ....,...... = k.

 

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined

Fill in the blank in of the following so as to make the statement true:

 If u = 3 v, then u and v vary .... with each other.

[11] Direct and Inverse Proportions
Chapter: [11] Direct and Inverse Proportions
Concept: undefined >> undefined
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