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Sakshee UpadhyayEduRev Mathematics |
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Sakshee Upadhyay
EduRev Mathematics
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Top Scoring Tests by Sakshee
Test: Graphical Representations | 24/24 |
Test: Real Numbers | 80/80 |
Test: Is Matter Around Us Pure | 40/40 |
Test: Separation Of Liquid Mixtures | 20/20 |
Test: Representation on Number Line | 35/40 |
Test: Algebraic Identities Quadratic | 60/80 |
Test: The French Revolution - 2 | 63/100 |
Test: Rational Numbers | 50/80 |
Important Questions (1 mark): Size And Location | 43/80 |
Matter In Our Surroundings - Olympiad Level MCQ, Class 9, Science | 13/25 |
Rated 5 
by Sakshee
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Discussed Questions
95×96 evaluate the profuct?
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Sanjana answered • Aug 07, 2018 |
95×(100-4) (95×100) -(95×4) 9500-380 =9120
In the above figure AB || CD. Also, ∠EAB = 84° and ∠ECD = 126°. Then, the value of “x” is
- a)80°
- b)150°
- c)120°
- d)160°
Correct answer is option 'B'. Can you explain this answer?
In the above figure AB || CD. Also, ∠EAB = 84° and ∠ECD = 126°. Then, the value of “x” is
a)
80°
b)
150°
c)
120°
d)
160°
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Sanjana answered • Aug 05, 2018 |
Through E ,draw a line EF||AB||CD now,AB||EF and AE is transversal angle EAB +AEF =180 84 + AEF =180 = AEF = 96 now EF||CD and EC is transversal angle ECD+CEF =180 126 + CEF =180 CEF = 54 angle AEC = AEF + CEF = 96 + 54 = 150
If a=5+2root6, then find the value of a^2 +1/a^2 ?
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Sanjana answered • Aug 05, 2018 |
A=5+2√6 then , 1/a = 1/5+2√6 = 1/5+2√6 × 5-2√6/5-2√6 = 5-2√6 /(5)² - (2√6)² =5-2√6/25-24 = 5-2√6 then, a+1/a = 5+2√6 +5-2√6 = 10 a+1/a =10 then squaring both side (a+1/a)² = (10)² a² +1/a² +2×a×1/a = 100 a² +1/a² +2 =100 a² +1/a² = 98
The value of (a2−b2)3+(b2−c2)3+(c2−a2)3 is- a)3(a−b)(b−c)(c−a)
- b)3(a+b)(b+c)(c+a)
- c)3(a+b)(b+c)(c+a)(a−b)(b−c)(c−a)
- d)none of these
Correct answer is option 'C'. Can you explain this answer?
The value of (a2−b2)3+(b2−c2)3+(c2−a2)3 is
a)
3(a−b)(b−c)(c−a)
b)
3(a+b)(b+c)(c+a)
c)
3(a+b)(b+c)(c+a)(a−b)(b−c)(c−a)
d)
none of these
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Sanjana answered • Aug 03, 2018 |
Let (a²-b²) =x , (b²-c²) =y , (c²-a²) = z we know that a+b+ c=0 and, a³ + b³ + c³ = 3abc so, 3(a+b)(a-b)(b+c) (b-c)(c+a)(c-a) = 3(a+b)(b+c)(c+a)(a-b)(b-c)(c-a)
- a)231
- b)320
- c)233
- d)336
Correct answer is option 'D'. Can you explain this answer?
a)
231
b)
320
c)
233
d)
336
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Sanjana answered • Jul 30, 2018 |
X+ 1/x = 7 then, cubing both side = (x +1/x)³ = (7)³ = x³ + 1/x³ + 3×X×1/X (x+1/x) = 343 = x³ +1/x³ +3(7) = 343 =x³ +1/x³ +21 =343 = x³ +1/x³ =343 - 21 = x³ +1/x³ = 322
What is momentum?
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Sanjana answered • Jul 30, 2018 |
The quantity of motion of a moving body , measured as a product of its mass and velocity
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Sanjana upvoted • Jun 09, 2018 |
Name a protozoan disease of honey bee.?
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Sanjana answered |
Nosema disease
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Sanjana upvoted • Jun 08, 2018 |
What is Tyndall effect ?
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Sanjana answered |
The tyndall effect is the scattering of light as a light beam passes through a colloid . the individual suspension particles scatter and reflect light, making the beam visible .
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Sanjana upvoted • Jun 07, 2018 |
Simplify 
- a)-75
- b)70
- c)75
- d)76
Correct answer is 'C'. Can you explain this answer?
Simplify
a)
-75
b)
70
c)
75
d)
76
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Sanjana answered |
First we break √125 into √5 ×√5×√5 and √45 into √5×√3×√3 √5×√5×√5×√5×√3×√3 = 5×5×3 =75 ......ans.
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Sanjana upvoted • Jun 07, 2018 |
Can you explain the answer of this question below:Add 
- A:
- B:
- C:
- D:
The answer is d.
Add
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Sanjana answered |
5√2+3√3 + 2√2-5√3 =5√2+2√2+3√3-5√3 =(5+2)√2 + (3-5)√3 = 7√2-2√3
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Sanjana asked • May 06, 2018 |
Why did president allende address himself mainly to 'workers'?why were the rich unhappy with him?this question is from political science?
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Reethika Kapoor answered |
President Allende's Address to Workers
President Salvador Allende addressed himself mainly to the workers because he believed that they were the backbone of Chilean society and the most important stakeholders in the country's economic and social development. He saw workers as the driving force behind the country's progress and believed that they deserved better working conditions, higher wages, and more opportunities for self-improvement.
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