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

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The given table shows the crop production of a State in the year 2008 and 2009. Observe the table given below and answer the given questions.

Crop 2008 Harvest
(Hectare)
Increase/Decrease
(Hectare) in 2009
Bajra 1.4 × 103 – 100
Jowar 1.7 × 106 – 440,000
Rice 3.7 × 103 – 100
Wheat 5.1 × 105 + 190,000
  1. For which crop(s) did the production decrease?
  2. Write the production of all the crops in 2009 in their standard form.
  3. Assuming the same decrease in rice production each year as in 2009, how many acres will be harvested in 2015? Write in standard form.
[10] Exponents and Powers
Chapter: [10] Exponents and Powers
Concept: undefined >> undefined

Express the following in exponential form:

`(-1296)/14641`

[10] Exponents and Powers
Chapter: [10] Exponents and Powers
Concept: undefined >> undefined

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Express the following in exponential form:

`(-125)/343`

[10] Exponents and Powers
Chapter: [10] Exponents and Powers
Concept: undefined >> undefined

Express the following in exponential form:

`400/3969`

[10] Exponents and Powers
Chapter: [10] Exponents and Powers
Concept: undefined >> undefined

Express the following in exponential form:

`(-625)/10000`

[10] Exponents and Powers
Chapter: [10] Exponents and Powers
Concept: undefined >> undefined

Percentages are ______ to fractions with ______ equal to 100.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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A regular hexagon is inscribed in a circle of radius r. The perimeter of the regular hexagon is ______.

[9] Mensuration
Chapter: [9] Mensuration
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A four-digit number aabb is divisible by 55. Then possible value(s) of b is/are ______.

[16] Playing with Numbers
Chapter: [16] Playing with Numbers
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A three-digit number abc is divisible by 5 if c is an even number.

[16] Playing with Numbers
Chapter: [16] Playing with Numbers
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Find the number of faces in the given shape:

[10] Visualizing Solid Shapes
Chapter: [10] Visualizing Solid Shapes
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Find the number of faces in the given shape:

[10] Visualizing Solid Shapes
Chapter: [10] Visualizing Solid Shapes
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Name the property under multiplication used in given:

`(-4)/5 xx 1 = 1 xx (-4)/5 = -4/5`

[1] Rational Numbers
Chapter: [1] Rational Numbers
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Fill in the blanks

Zero has __________ reciprocal.

[1] Rational Numbers
Chapter: [1] Rational Numbers
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Draw the following:

The square READ with RE = 5.1 cm

[4] Practical Geometry
Chapter: [4] Practical Geometry
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Draw the following:

A rhombus whose diagonals are 5.2 cm and 6.4 cm long.

[4] Practical Geometry
Chapter: [4] Practical Geometry
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Draw the following:

A rectangle with adjacent sides of length 5 cm and 4 cm.

[4] Practical Geometry
Chapter: [4] Practical Geometry
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Draw the following:

A parallelogram OKAY where OK = 5.5 cm and KA = 4.2 cm.

[4] Practical Geometry
Chapter: [4] Practical Geometry
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Find the square roots of 100 and 169 by the method of repeated subtraction.

[5] Squares and Square Roots
Chapter: [5] Squares and Square Roots
Concept: undefined >> undefined

A shopkeeper buys 80 articles for Rs 2,400 and sells them for a profit of 16%. Find the selling price of one article.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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The cost of an article was Rs 15,500. Rs 450 were spent on its repairs. If it is sold for a profit of 15%, find the selling price of the article

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
Concept: undefined >> undefined
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