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Ask QuestionPosted by S Sai Avinash 5 years, 7 months ago
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Posted by Srushti Arote 5 years, 7 months ago
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Posted by Aditya Thakur 5 years, 7 months ago
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Sajal Choudhary 5 years, 7 months ago
Posted by Komal Sharma 5 years, 7 months ago
- 1 answers
Gaurav Seth 5 years, 7 months ago
How many non-square numbers lie between the following pairs of numbers:
(i) 1002 and 1012 (ii) 902 and 912
(iii) 10002 and 10012
Answer:
i) Between 1002 and 1012
Here, n=100 ∴ n x2 = 100 x 2 = 200
∴ 200 non-square numbers lie between 1002 and 1012 .
(ii) Between 902 and 912
Here, n=90 ∴ 2 x n = 2 x 90 or 180
∴ 180 non-square numbers lie between 90 and 91.
(iii) Between 10002 and 10012
Here, n = 1000 ∴ 2 x n = 2 x 1000 or 2000
∴ 2000 non-square lie between 10002 and 10012.
Posted by Manish Goswami 5 years, 7 months ago
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Posted by Manish Goswami 5 years, 7 months ago
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Posted by Aditya Thakur 5 years, 7 months ago
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Posted by Niharika Sathwika 5 years, 7 months ago
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Posted by Viral Choudhary 5 years, 7 months ago
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Posted by Nildip De 5 years, 7 months ago
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Gaurav Seth 5 years, 7 months ago
Given, Total number participants = 63
Total prize money distributed =
Rs 3000Winner gets a prize of Rs 100
Who does not win gets a prize of Rs 25
Number of winners = ?
Let the number of winners = m
Since,Number of winners + Number of losers = Total number of participants
Or, m + Number of losers = 63
By transposing ‘m’ to RHS, we getNumber of losers = 63 – m
Now,Total Prize money distributed to winners=
Number of winners X prize money distributed to each winner = m X 100 = 100m
Total prize money distributed to losers
= Number of losers X prize money distributed to each loser= (63 – m) X 25 = (63 x 25) – 25 m = 1575 – 25 m
Now,Total Prize money of winners + Total Prize money of losers =
Total prize money
By substituting the total prize money distributed to winners and total prize money distributed to losers, we get100 m + 1575 – 25 m = 3000
⇒ 100 m – 25 m + 1575 = 3000By transposing 1575 to RHS, we get100 m – 25 m = 3000 – 1575⇒75 m = 1425
After dividing both sides by 75, we get the answer.
Thus, number of winners = 19 Answer
Gaurav Seth 5 years, 7 months ago
Let the number of winners =x
∴ Number of participants who are not winners = (63 - x)
∴ Prize money given to: Winners = x
Rs 100 = Rs 100 x
Non-winner participants = Rs 25 
(63-x)
= Rs 25 
63 - Rs 25x
= Rs 1575 - Rs 25x
According to the condition, we have
100x + 1575 - 25x = 3000
or 75x = 3000 - 1575 [Transposing 1575 to RHS]
or 75x = 1425
or x = 1425 
75 = 19
Thus, the number of winners = 19
Posted by Vaman Mayache 5 years, 7 months ago
- 2 answers
Posted by Sakshi Singh 5 years, 7 months ago
- 2 answers
Gaurav Seth 5 years, 7 months ago
Find selling price (SP) if a profit of 5% is made on
(a) a cycle of Rs 700 with Rs 50 as overhead charges.
(b) a lawn mower bought at Rs 1150 with Rs 50 as transportation charges.
(c) a fan bought for Rs 560 and expenses of Rs 40 made on its repairs.
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Posted by Rahul Kumar 5 years, 7 months ago
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Posted by Adarsh Dubey 5 years, 7 months ago
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Posted by Aditya Thakur 5 years, 7 months ago
- 4 answers
Gaurav Seth 5 years, 7 months ago
- Parallelogram: A quadrilateral with each pair of opposite sides parallel.
(1) Opposite sides are equal.
(2) Opposite angles are equal.
(3) Diagonals bisect one another.
- Rhombus: A parallelogram with sides of equal length.
(1) All the properties of a parallelogram.
(2) Diagonals are perpendicular to each other.
- Rectangle: A parallelogram with a right angle.
(1) All the properties of a parallelogram.
(2) Each of the angles is a right angle.
(3) Diagonals are equal. -
- Square: A rectangle with sides of equal length.
(1) All the properties of a parallelogram, rhombus and a rectangle.
- Kite: A quadrilateral with exactly two pairs of equal consecutive sides
(1) The diagonals are perpendicular to one another
(2) One of the diagonals bisects the other.
(3) In the figure
but 
.
- Trapezium: A quadrilateral having exactly one pair of parallel sides.
- Diagonal: A simple closed curve made up of only line segments. A line segment connecting two non-consecutive vertices of a polygon is called diagonal.
- Convex: The measure of each angle is less than
. - Concave: The measure of at least one angle is more than
- Quadrilateral: Polygon having four sides.
- Element of quadrilateral:
(i) Sides: Line segments joining the points.
(ii) Vertices: Point of intersection of two consecutive sides.
(iii) Opposite sides: Two sides of a quadrilateral having no common endpoint.
(iv) Opposite Angles: Two angles of a quadrilateral not having a common arm.
(v) Diagonals: Line segment obtained by joining the opposite vertices.
(vi) Adjacent Angles: Two angles of a quadrilateral having a common arm.
(vii) Adjacent Sides: Two sides of a quadrilateral having a common endpoint.
For ncert exercise copy the given link:
https://mycbseguide.com/blog/ncert-solutions-for-class-8-mathematics/
Posted by Aditya Thakur 5 years, 7 months ago
- 1 answers
Posted by Vidhi Gulgulia 5 years, 7 months ago
- 1 answers
Yogita Ingle 5 years, 7 months ago
Let ones place = x
Tens place = y
number will be = 10y +x
Number after reversing the digits = 10y +x
According to question:
x+y = 12 ⇒ x= 12- y ------(i)
(10y+x) -36 = 10x+y
⇒ 10y +x -10x-y =36 ⇒ 9y - 9x=36 ⇒ y-x=4 ----(ii)
Put the value of (i) in (ii)
y-(12-y)= 4 ⇒ y-12+y = 4 ⇒ 2y= 16 ⇒ y= 8 x= 4
Given number is 10y+x = 10 x 8+4 = 84
Hence, the number is 84
Posted by Mahak♥️ Gupta 5 years, 7 months ago
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Posted by Manoj Edvani 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
Which among these is not a perfect square? a. 225/729 b. 1.96 c. 624 d. 1600
624 is not a perfect square.
Posted by Aditya Thakur 5 years, 7 months ago
- 1 answers
Yogita Ingle 5 years, 7 months ago
- Opposite sides are parallel and congruent
- Opposite angles are congruent
- Consecutive angles are supplementary
- Diagonals bisect each other
Posted by Amrita M Nambiar 5 years, 7 months ago
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Posted by Prince Sarkar 5 years, 7 months ago
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Abhi Yuki 5 years, 7 months ago
Posted by Azath Shariff 5 years, 7 months ago
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Posted by Ganesh Srinivasan 5 years, 7 months ago
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Posted by Øm Kümãr 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
8x –4+11x+(–14)
= 8x - 4 + 11x - 14
=8x + 11x - 4 - 14
= 19x - 18
Posted by Av Vashisht 5 years, 7 months ago
- 1 answers
Gaurav Seth 5 years, 7 months ago
Probability:
Probability is defined as the numerical method of measuring uncertainty involved in a situation.
It is widely used in the study of mathematics, statistics, gambling, physical science, biological science, weather forecasting, finance etc. to draw conclusions.
Posted by Avneet Chouhan 5 years, 7 months ago
- 5 answers
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Yogita Ingle 5 years, 7 months ago
X+34(20+13)=5(5x+5)
x + 34(33) = 5 (5x) + 5 (5)
x + 1122 = 25x + 25
x - 25x = 25 - 1122
- 24x = - 1097
x = 1097/24
x = 45.71
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