This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Find the general solution of cos 5x = sin 3x. |
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| 2. |
2Divide the polysomial 2-118 +34*-by X-2 and find the quotient and theMemander Also verifyalgoritherthe dicciscon |
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Answer» Given f(x) = x^4 - 11x^2 + 34x - 12. Given g(x) = x - 2. Now, we need to divide f(x) by g(x). x^3 + 2x^2 - 7x + 20 -----------------------------------x - 2) x^4 - 11x^2 + 34x - 12 x^4 - 2x^3 --------------------------------------- 2x^3 - 11x^2 + 34x - 12 2x^3 - 4x^2 ------------------------------------------- -7x^2 + 34x - 12 - 7x^2 + 14x - 12 ------------------------------------- 20x - 12 20x -40 ------------------------------------ 28 We know that Dividend = Divisor * Quotient + Remainder = > (x - 2) * (x^3 + 2x^2 - 7x + 20) + 28 = > x^4 + 2x^3 - 7x^2 + 20x - 2x^3 - 4x^2 + 14x - 40 + 28 = > x^4 - 11x^2 + 34x - 12 = > Dividend |
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| 3. |
2. Multiply the following binomials and verify the results for the given values(i) (2x2-5y) (5x + 2y®) ; x = 2, y =-1 |
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Answer» hello this is a very tough question. I am also following this. |
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| 4. |
Find the median and mode of the following data and comparethe results |
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Answer» Where is the data provided? |
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| 5. |
simplify the following and verify the results for the giveni)(e-4xy + y) (x-2y) ; x = 3, y = 2 |
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| 6. |
Multiply the following binomials and verify theresults for the given values(3y-8) X (5y-1) for x=0 and y=-2 |
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Answer» (3y - 8) × ( 5y - 1)when x = 0 and y = -2(-6 - 8) × (-10 -1)(-14) × (-11)154 |
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| 7. |
-+----এর1-01-b 1-৫।a b c61. *-+---+-=-=1- 1-81-মান হবে।| (A) 0(B) 1(C) 2(D) 4 |
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Answer» and is 4.....like my answer a) 0 is the correct answer B) is the correct answer option d is the correct answer of the given question the correct answer is 4 option (D) 4 is the right answer. |
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| 8. |
State Bank Wali Gali, Rallood6+. 37 +.843(b) 1.884347(a) 1.884247BRAIC FORMULAE(475 + 425)2-4 × 475 ×)2000 (b) 2500(o1×11+11 × 6 + 11 × 6+611 +6 |
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| 9. |
t ( a + b + c ) ^ { 3 } - a ^ { 3 } - b ^ { 3 } - c ^ { 3 } = 3 ( a + b ) ( b + c ) ( c + a ) |
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| 10. |
'Multiple Choice Questions (MCQs): 10. A 200 m long train crosses a platform of double its length in 36 seconds. Find the speed of thetrain in km/h.(a) 60 km/hr(b) 48 km/hr(c) 64 km/hr(d) 66 km/hr |
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Answer» speed = 200 m/36 s = 200*18/36*5 km/hr = 20 km/hr |
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| 11. |
The Probability that a leap year has 53 Sundays, is kapt daze k5777nts (y cosO t y sinO n and (0, x sino -y cosQ) is |
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Answer» A leap year has 366 days or 52 weeks and 2 odd days. The two odd days can be {Sunday,Monday},{Monday,Tuesday},{Tuesday,Wednesday},{Wednesday,Thursday},{Thursday,Friday},{Friday,Saturday},{Saturday,Sunday}. So there are 7 possibilities out of which 2 have a Sunday. So the probability of 53 Sundays is 2/7. (b) is correct option option 2 is right . leap year ka 2/7 hota hai aur normal year ka 1/7 hota hai. please like |
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| 12. |
12/6 : 11 :: 11 : ?(A) 6(B) 17(C) 20(D) 30 |
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Answer» 6:11=11:6 hoga NMD ah kk option (D) 30for 6:116 = 2^2+211 = 2^3 + 3similarlyfor 11:? 11= 3^2 + 2? = 3^3 + 3 = 30hence, ? = 30 |
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| 13. |
sin 5x -2sin 3x + sin xcos 5x- cos x40. Prove thatat tan Ď |
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Answer» (sin5x-2sin3x+sinx)/(cos5x-cosx)=[{2sin(5x+x)/2cos(5x-x)/2}-2sin3x]/{2sin(5x+x)/2sin(x-5x)/2}=(2sin3xcos2x-2sin3x)/{2sin3xsin(-2x)}={2sin3x(cos2x-1)}/{-2sin3xsin2x}=-(cos2x-1)/sin2x=(1-cos2x)/sin2x=2sin²x/2sinxcosx=sinx/cosx=tanx (Proved) hit like if you find it useful |
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| 14. |
\left. \begin array l \text If p ( A ) = 6 / 11 , p ( B ) = 5 / 11 \text and p ( A U B ) = 7 / 1 \\ p ( A \cap B ) . \end array \right. |
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| 15. |
2.Fill in the blanks with >,<or=sign.(a) (-3)+(-6) (-3)-(-6)(b) (-21)-(-10) (-31)+(-11)(c) 45-(-11)_ _57+(-4)(d) (-25)-(-42)__(-42)-(-25) |
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Answer» A)<B]>C]>D]> this is the right answer |
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| 16. |
Find the value of unknown quantities or variabla. P-8 7b. f+11 6 |
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Answer» P-8=7P=8+7P=15 f÷11=6f=11×6f=66 |
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| 17. |
A ७ sSin® —cosO+1 1\))(fism O+cosO-1 secHb-tand[CBSE 2001, NCERT] |
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Answer» LHS = (sinθ - cosθ + 1)/(sinθ + cosθ - 1) dividing by cosθ both Numerator and denominator = (sinθ/cosθ - cosθ/cosθ + 1/cosθ)/(sinθ/cosθ + cosθ/cosθ - 1/cosθ)= (tanθ + secθ - 1)/(tanθ - secθ + 1) Multiply (tanθ - secθ) with both Numerator and denominator = (tanθ + secθ - 1)(tanθ - secθ)/(tanθ - secθ + 1)(tanθ - secθ) = {(tan²θ - sec²θ) - (tanθ - secθ)}/(tanθ - secθ + 1)(tanθ - secθ)= (-1 - tanθ + secθ)/(tanθ - secθ + 1)(tanθ - secθ) [ ∵ sec²x - tan²x = 1 ]= -1/(tanθ - secθ) = 1/(secθ - tanθ) = RHS |
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| 18. |
Example 6.(i) If a : b = 5:7 and b: c = 6:11, then find a : b:e.(id) If a : b = 2:3, b: c = 4:5 and c:d = 6:7, then find a : b:e:d. |
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| 19. |
triangle, if its perimeter is 55 m.7 Divide 34 into two parts in such a way that four-seventh of one part is equal to two-fifth of the other.ins nd some 50-paise coins. The total amount in the bag is 25. If the |
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Answer» Let two parts of number are x and (34 - x) As per given condition(4/7)x = (2/5)(34 - x)4x/7 = 68/5 - 2x/54x/7 + 2x/5 = 68/5(20x + 14x)/35 = 68/534x/35 = 68/5x = 68*35/34*5x = 2*7 = 14 Therefore two parts of number are 14 and 20 |
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| 20. |
Prove that (cos 7x + cos 5x /sin 7x - sin5x) = cot x |
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Answer» cos7x+cos5x = 2cos6xcosx sin7x-sin5x = 2cos6xsinx (cos7x+cos5x)/(sin7x-sin5x) = 2cos6xcosx/2cos6xsinx = cotx |
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| 21. |
A company packages its mik pow der in cylindricalcontainer whose base has a diameter of 14 cm and height20 cm. Company places a label around the surface ofthe container (as shown in the figure). If the label is placed2 cm from top and bottom. what is the area of the label. |
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| 22. |
3= sin ๑ . los 프180180l 80쁜 _ coso, sin lee toso. cos leo t sino. sin L3天一千sino. sin -2-= sino, cos-ニsino. Cos 30-coso. Sin 30+ cos o. cos 60+sino, sin 60°V3 |
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| 23. |
LEVEL. 210. Prove the following results using DeMoivre's Theorem:II. (sino (coso)((cosno - isinno)coso i |
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| 24. |
S.+a +Va-b?a-Va? - ba -Va? -67 .a +Va? – b?-এর লব হল-(a) a?(b) b2(c) a? - b2(d) 4a? - 262 |
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| 25. |
19. Find the mean marks by step deviation method from the following dataBelow 10 Below 20 Below 30 Below 40 BMarksNo. of studentsBelow 50 Below 6010184070 |
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| 26. |
Sino-coso then find the |
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Answer» tan theta = 1theta= 45°then 2tan45°+ cos^2(45°)2+1/23/2 |
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| 27. |
15. In a rectangular park of dimensions 50 m x 40 m, a rectangular pondis constructed so that the area of grass strip of uniform widthsurrounding the pond would be 1184 m. Find the length and breadthof the pond.(CBSE 2017 |
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Answer» Here insufficient info is given. value of lenth or breadth is essential. sorry I didn't know Subtract area of strip surrounding pond from total area .You obtain area of pond.l×b = area solve the question ahead |
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| 28. |
g, Can you construct a triangle whose angles are:(8) 45, 60° and 73 (b) 500, 68° andieos(c) 70°, 48° and 62° (d) 90°, 30°, 90° |
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Answer» option C is right answer A triangle is only possible when sum of angles are 180°a) 45° + 60° + 73° = 178°, not possibleb) 50° + 68° + 62° = 180°, possiblec) 70° + 48° + 62° = 180°, possibled) 90° + 30° + 90° = 210°, not possible 1because all angles have more 1angles and measure in the compase |
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| 29. |
Find x in terms of a, b and c2c |
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Answer» Given,:a/(x-a) + b/(x-b) = 2c/(x-c)[a(x-b)+b(x-a)]/(x-a)(x-b) = 2c/(x-c)(x-c)[a(x-b)+b(x-a)] = 2c(x-a)(x-b) ax2 – 2abx + bx2 - acx + 2abc – bcx = 2cx2 – 2bcx – 2acx + 2abcax2+ bx2 - 2cx2 = 2abx – acx – bcx(a+b-2c)x2 = x(2ab – ac – bc)(a+b-2c)x2 - x(2ab – ac – bc) = 0x[(a+b-2c)x - (2ab – ac – bc)] = 0x = 0 or (a+b-2c)x - (2ab – ac – bc) =0x = 0 or (a+b-2c)x = (2ab – ac – bc)x = 0 or x = (2ab – ac – bc) / (a+b-2c) 2 roots of the given equation are x = 0 and x = (2ab – ac – bc) / (a+b-2c) |
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| 30. |
7. Find the ratio of the following:(a) 30 minutes to 1.5 hours(c) 55 paise to 1(b)40 cm to(d)1.5 m500 mL to 2 litres |
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Answer» ratio of A =1:3,B=4:15,C I dont now, D=1:4 |
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| 31. |
2013सारणी 14.4वर्ग अंतराल | विद्यार्थियों की | वर्ग चिह्न | d=3- 47.5संख्या (f)10.-2517525-4032.540-5547555-7062.570-8577.56-02025योगEf= 30aawnअत:, सारणी 14.4 से, विचलनों का माध्य a =|| |
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| 32. |
Find the median of the following observations.46, 64, 87, 41, 58, 77, 35, 90, 55, 92, 33.If 92 is replaced by 99 and 41 by 43 in the above data, find the new median.ウ ) |
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| 33. |
ORFind the value of x. if 2+28 - 021522. Two dice are thrown simultaneously 500 times. Each time sum of two numbers appearingon their tops is noted and recorded as given in the following tableSum13456789 10 11 12Frequency 14 30 42 55 72 75 70 53 46 28 15If the dice are thrown once more than what is the probability of getting a sum1) 3il) more than 107il) less than or equal to 5iv) between 8 and 12? 10 x 3 = 30 |
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| 34. |
THINK ABOUTWhat are the things the child sees on his way to the fair? Why does he |
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| 35. |
Find the median of the following dara.41, 43, 127, 99,61,92, 11,58,5t. If 58 is replaced by 25 hem find hnew median |
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| 36. |
Find the median of the following data 15, 28,72,56, 44,32, 31, 43 and 51. If32 is replaced by 23, find thenew median. |
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| 37. |
76.Find the median of the data46, 41, 77, 58, 35, 64, 87, 92, 33, 55, 90.In the above data, if 41 and 55 are replaced by 61 and 75 respectively,what will be the new median? |
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| 38. |
x-a÷x+b=x+b÷a-b |
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| 39. |
Find the following data19,25,59,48,35,31,30,32,51 if 25 is replaced by 52 what will be new median |
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Answer» First arrange data in ascending order19, 25, 30, 31, 32, 35, 48, 51, 59 Total number of terms are 9So median = (9 + 1)/2 term Median is 5th term = 32 If we replace 25 by 52Then, data in ascending order19, 30, 31, 32, 35, 48, 51, 52, 59 New median is 5th term = 35 |
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| 40. |
(4x2 + 11x-3) by (x + 3)) (xr-9x2 + 26x-24) by (x-4)vide.(ii)(i)(iii)(1)(x2+ 8x + 15) by (x + 5)(3 +x- 2c2) by (x + 1)(xs_ 3x2y + 3xy2-v3) by (x-y)ZZl15) by (2x -3) |
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| 41. |
Show that-all-A = tan' Acot2 A-14. |
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| 42. |
3. Write the value of cot2 e-2sin 0 |
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| 43. |
\frac { a } { x - a } + \frac { b } { x - b } = \frac { 2 c } { x - c } , ( x \neq a , b , c ) |
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| 44. |
\frac{a}{x-a}+\frac{b}{x-b}=\frac{2 c}{x-c}, x \neq a, b, c |
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Answer» A / (x - a) + b / (x - b) = 2c / (x - c)=> [a(x - b) + b (x - a)] / (x - a) (x - b) = 2c / (x - c)=> [(a + b) x - 2ab] (x - c) = 2c [x^2 - (a + b)x + ab]=> (a + b) x^2 - [2ab + c(a + b)]x + 2abc = 2cx^2 - 2c(a + b)x + 2abc=> (a + b - 2c) x^2 = (2ab + ac + bc - 2ca - 2bc) x=> (a + b - 2c) x^2 = (2ab - ca - bc) x=> x = 0or x = (2ab - ca - bc) / (a + b - 2c) thanks bro...... plzzz..... solve my next math |
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| 45. |
-dx*(-x %2B y) %2B dy*(x %2B y)=0 |
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| 46. |
dx*x^2 %2B dy/y=0 |
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Answer» x²dx + 1/y dy = 0 Integrating ∫x²dx + ∫ 1/y dy = 0 x³/3 + log y = C |
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| 47. |
dx*(x^2*y - x^2) %2B dy*(x*y^2 - y^2)=0 |
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| 48. |
If ะ.ะก.F. and .L.C.M. oftwo number A and B are H and Lrespectively. then the value of B will be |
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Answer» We know HCF × LCM = product of number HL = AB So, B = HL/A |
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| 49. |
\frac { a } { x - a } + \frac { b } { x - b } = \frac { 2 c } { x - c } |
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Answer» A / (x - a) + b / (x - b) = 2c / (x - c)=> [a(x - b) + b (x - a)] / (x - a) (x - b) = 2c / (x - c)=> [(a + b) x - 2ab] (x - c) = 2c [x^2 - (a + b)x + ab]=> (a + b) x^2 - [2ab + c(a + b)]x + 2abc = 2cx^2 - 2c(a + b)x + 2abc=> (a + b - 2c) x^2 = (2ab + ac + bc - 2ca - 2bc) x=> (a + b - 2c) x^2 = (2ab - ca - bc) x=> x = 0or x = (2ab - ca - bc) / (a + b - 2c) |
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| 50. |
\frac { 2 x + 3 } { ( x + 1 ) ( x - 3 ) } = \frac { A } { x + 1 } + \frac { B } { x - 3 } , \text { then find } A + B |
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Answer» A+B=9/4 + (-1/4)=9/4-1/4=2 |
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