Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

68051.

Find the LCM and HCF of the following pairs of integers and verify that LCM x HCF-product of the two numbers.0 26 and 91310 and 92(i) 336 and 54

Answer»

26 = 2 x 1391=7 x 13HCF = 13LCM =2 x 7 x 13 =182Product of two value 26 x 91 = 2366Product of HCF and LCM 13 x 182 = 2366

ii. 510 = 2 x 3 x 5 x 1792 =2 x 2 x 23HCF =2 LCM =2 x 2 x3 x 5 x 17 x 23 = 23460Product of both values 510x92 = 46920Product of HCF and LCM 2x23460 =46920Hence, product of two numbers = product of HCF × LCM.

Let a = 336 ,

b = 54

Expressing a and b as a product of

prime factors

336 = 2 × 2 × 2× 2 × 3 × 7 = 2^4 × 3 × 7

54 = 2 × 3 × 3 × 3 = 2 × 3^3

HCF ( 336 , 54 ) = 2 × 3 = 6

LCF( 336 , 54 ) = 2^4 × 3^3 × 7 = 3024

We know that ,_____________________________

For any two positive integers a and b .

HCF( a , b ) × LCM( a , b ) = a × b

Verification :

HCF( 336 , 54 ) × LCM( 336 , 54 )

= 6 ×3024= 18144 -----( 1 )a × b = 336 × 54 = 18144 ----( 2 )

Therefore ,( 1 ) = ( 2 )

thanks for all answers

68052.

heorem 8.2 : In a parallelogram, opposite sides are equal.

Answer»

AC and BD are the diagonals of the parallelogram.

Each diagonal of the parallelogram divides the parallelogram into two congruent triangles.

ΔADC ≅ ΔABC

∴ Corresponding sides of congrunt triangles are equal.⇒CD = AB⇒ AD = BC

Hence the opposite sides of the parallelogram are equal.

68053.

AFind HCF and LCM of following pairs of integersby prime factorisation method and verify that LCMx HCF = Product of the two numbers:() 26, 91(ii) 21, 315 (ii) 77, 979

Answer»

26 = 2*1391 = 7*13Hence H.C.F = 13L.C.M = 13*7*2=13*14=182H.C.F * L.C.M = 13*182 = 2366Product of the two numbers = 26*91 = 2366

Hence H.C.F * L.C.M = product of the two numbers..

68054.

40. Sum of the first 14 IO25th term.41. Find the sum of first 51 terms of an AP whose second and third termsare 14 and 18 respectively.nlant trees in and around the school to

Answer»
68055.

The base angle of an isosceles trapezium is 45°. If theshorter side and both the equal sides are 20 cm each,find the area of the trapezium.

Answer»
68056.

ur numbers in AP whose sum is 28 and the sum of whose

Answer»
68057.

Find the LCM and HCF of the following pairs of integers and verify that LCMHCF = product of the two numbers.(i) 26 and 91(ii) 510 and 92(iii) 336 and 54

Answer»
68058.

find the square root of 559504 by division method

Answer»

square root of 559504 is 748.

DIDI how can you find it

I tried more but , I can't find it

68059.

5.Find the missing angles in a isosceles trapezium.

Answer»
68060.

7) Two parallel sides of an isosceles trapezium are 16 cm and 24cm respectively. If the lengths of gach non-parallel side is 5 cm.find the area of the trapezium

Answer»

Thanks for the answer

68061.

12. Find the square root of 5776 bydivision method.

Answer»
68062.

12. Find the square root of 5776 by division method2

Answer»
68063.

f the roots ofDU - UD +b .17. If the ratio of the roots of the equation, Xx + 2x + m = 0, then prove that pm = 1-9.equation, x + px + g = O be equal to ratio of the rooPTC1

Answer»

We are assuming that the roots ofx^2 + px + q = 0areα, βwhile roots ofx^2 + lx + m = 0areγ, δ. So, as we're given,

α/β=γ/δ

By using the sum and product of roots formulae, we can say that

α + β = -p;αβ = qγ + δ = -l;γδ = m

We have to prove that m.p^2 = q.l^2.

We are given thatα / β = γ / δ ------------(1)Reciprocating both the sides, we'll getβ / α = δ / γ -------------(2)

Adding(1)and(2), we'll get

=> (α / β) + (β / α) = (γ / δ) + (δ / γ)=> (α^2 + β^2) /αβ = (γ^2 + δ^2) /γδ

Adding 2 on both the sides,

=> [(α^2 + β^2) /αβ] + 2 = [(γ^2 + δ^2) /γδ] + 2=> (α^2 + β^2 + 2αβ) /αβ = (γ^2 + δ^2 + 2γδ) /γδ=> (α + β)^2 /αβ = (γ + δ)^2 /γδ

Now, using α + β = -p, αβ = q, γ + δ = -l, γδ = m,

=> (-p)^2 /q = (-l)^2 /m=> m.p^2 = q.l^2

Hence Proved.

68064.

Find the square root of the number 5776 by division method.

Answer»
68065.

A (6,3), B (-3,5), C (4,-2) and D (x, 3x)are given in such a way that27. Four pointsADBC 1AABC 2-find x.

Answer»
68066.

21. AABC and ADBC are on the same base BCand on opposite sides of BC. If O is the pointof intersection of BC and AD, prove that:ar(AABC) AOar(ADBC) DO

Answer»
68067.

OrAIBC and ADBC are on the same base BC and on opposite side of BC and O is the point ofntersection of AD and BC.Prove that : ar AMBC Aoar(ADBC) DO

Answer»
68068.

In Δ ABC, DEI BC., If DE-3 BC and area of Δ ABC : 81 cm, find the area of Δ ADE.91

Answer»

In triangle ADE and triangle ABC

angle A = angle A ( common )

angle ADE = angle ABC ( corresponding angles, DE is parallel to BC)

therefore, triangle ADE is similar to triangle ABC ( by AA corollary of AAA)

area of triangle ADE / area of triangle ABC = (DE) / (BC)

area of triangle ADE / 81 = (2/3 BC)/ (BC)

area of triangle ADE = 2/ 3 * 81

area of triangle ADE = 54 cm^2

it's not answer

answer is 54

68069.

4. Find the sum of first 18 terms of the A. P. 331031 4 7

Answer»
68070.

Find the sum of first 51 terms of an AP whose second and third terms are 14& 18 respectively

Answer»
68071.

s. Find the sum of first SI terms of an AP whose second and third terms are 14 and 18respectivelh

Answer»
68072.

EXERCISE 1.2ach number as a product of its prime factors:(0) 156(m) 3825CM and HCF of the following pairs of integerf the two numbersnd 91CM and HCF of the following integers by a(u) 510 and 92

Answer»
68073.

are A25. In the adjoining figure, AABC and ADBCon the same base BC with A and D on oppositesides of BC such that ar(AABC) ar(ADBC)Show that BC bisects AD

Answer»
68074.

OrAABC and ADBC are on the same base BC and on opposite side of BC and O is the point ofintersection of AD and BC.AProve that: ar(44BC)ar(ADBC) DO

Answer»
68075.

What is a trapezium? When do you call a trapezium an isosceles trapeziumDraw an isosceles trapezium. Measure its sides and angles.which arefalse?

Answer»
68076.

he...cost--업 0-://ud ecerttulre_ in乏57-. Keli.mart t-Sud.-ㄚㄧ奄ー133sa

Answer»

Cost of one tube = ₹57Number of tubes = 19893/57 = 349

68077.

Q3. What is a trapezium? When do you call a trapezium an isosceles trapezium?

Answer»
68078.

Ceck whether the g(x) is a factor of the p(x) byapplying the division algorithm.p(x) - 2x^3-4x^2 + 2x +5x + 1,g(x) x^2 -4x + 1

Answer»
68079.

using division method find square root up to two decimal place.2. 150

Answer»
68080.

Power of an electric- circuit is(A) V.R(C) V2(B) V. R(D) V? Rt

Answer»

Ohm's lawequation(formula): V = I × R and thepowerlawequation(formula): P = I × V.

I = V/R from ohm's law

Substituting I in P, we get,

P = V/R * V

P= V²/R

like my answer if you find it useful!

68081.

. In given figure PQ lI RT. Find the values of a, b and c.Cl55°

Answer»

C=180-(80+55) =180-135 = 45

A is equal to C (because PQ and RT are parallel)A=45

B=55 (because PQ and RT are parallel)

c+80°+55°=180°.... {sum of angles of triangle is 180c=180°-135°=45°b=55°...... {alternate anglesa=c=45°..... {corresponding angle

80+55+c=180135+c=180C=180-135C=45

A equal c (beace ac is a corresponding angle) C=45

B equal q( because bq ias alternate angle) Hence b=55

68082.

Q14) Find the remainder when x-3x2 +2+x divided by (x-2) using division method, and verify by usingremalnder theorem.

Answer»
68083.

20. In given figure Pe I RT. Find the values of a, b and c.,6 and c30°9

Answer»

It's wrong

68084.

4. Find the sum of first 18 terms of the A. P .33 3'334. In an A. P., a 8, Tn-33, Sn 123, find d and n.

Answer»

in the apa=1/3d=4/3-1/3=3/3=1n=18henceSn=n/2(2a+(n-1)d)henceS18=18/2(2*1/3+17*1)=9(2/3+17)9(2+51/3)3(53)=159

68085.

ABCD is a trapezium such that AB and CD are parallel and BC perpendicular CD, If angleADB=theta, BC=P and CD=q then AB is equal to

Answer»
68086.

ABCD is a trapezium of area 91 cm?. CD is parallel to AB and CD is longer than AB by8 cm. If the distance between AB and CD is 7 cm, find AB and CD

Answer»

Area of a trapezoid/trapezium is the height multiplied by the sum of parallel sides and this whole equation divided by 2.

68087.

13. In the given figure ABCD is trapezium in which theparallel sides AB and CD both are perpendicular toBC. If AB = 16 m, CD= 8 m and AD = 17 m. Whatis the area of the trapezium ?p8m →O-17 m4- 16 m

Answer»
68088.

ABCD is a trapezium with AB parallel to DC.If AB =10 cm, AD=BC =4 cm and<DAB=<CBA =60°, calculate(0) the length of CD;(i) the distance between AB and CD.

Answer»
68089.

= 298 81. W‘udil S i SR

Answer»

1 minute=60 seconds

60 seconds=1 minute1 second=1/60 minute18 seconds=1/60 * 18=3/10 minutes

68090.

5, ABCD is a trapezium in which AB | | CD and AD = BC.show that :(i)

Answer»

∆ ADC is congurent to ∆BDCby SSS rule , so angle C = angle Dsimilarly∆DBA is congurent to ∆CBA by SSS ruleso angle A = angle B

68091.

6. Use the factor theorem whether g(x) is a factor of p(x) or2not if p() = x3 + 3x2 + 3x + l and g(x) = x +52

Answer»
68092.

In triangles PQR and TSM, <P = 55% <Q = 25°, LM = 100。and /S = 25°. Is Δ。PR ~ ΔTSM? Why?

Answer»
68093.

Q14) Find the remainder when x-3x2 +2+x divided by (x-2) using division method, and verifyremainder theorem.

Answer»
68094.

-81-63-33 +1-176.Example 2 Using remainder theorem, find the remainder on dividing 3x2 +5x-11 by 2x +5.

Answer»

By remainder theorem put x= -5/23(-5/2)^2+5(-5/2)-113(25/4)-25/2-1175/4-25/2-1175-25-88/4= -38/4= -19/2=- 9.5

68095.

e of k if on dividing 2x3+3x2-kx+5 by x -2,5 Using remainder theorem, find the value of k if on dividing 2r3 +3x2 - kx + 5 by r-2(2016)leaves a remainder 7.

Answer»

Please hit the like button

68096.

If p, q, r, s, t are in G.P then pt -A) rtB) qrC) rsD) qs

Answer»

Mean of p and t = r => r*r = ptMean of q and s = r => r*r = qsTherefore, pt = qs. Option D is the answer.

68097.

OR4. In an A. P. a 8, T 33, Sn 123. find d and n.rt

Answer»
68098.

ill the given figure of Δ PQR. mZP 570, m20-610 then m2RComplete the activity by filling in the boxes.m2P + m/Q mR 180°57+61572m2Rbserve the ABCD and answer the questions.

Answer»
68099.

In the adjoining fig. ABCD is a trapeziumAB CD and its area is 33 cm. From theinformation given in the figure find the lengths ofall sides of the DABCD. Fill in the empty boxesto get the solution.y-2)

Answer»
68100.

& waite the name o P+ hflfims_.“»__[theosem in wo2ds '‘ond तु So “waite_the formulo by deowing कोil 3 3 %kd&n%lm,

Answer»

In mathematics, thePythagorean theorem,alsoknown asPythagoras'theorem, is a fundamental relation in Euclidean geometry among the three sides of aright triangle. It states that the square of the hypotenuse (the side opposite theright angle) is equal to the sum of the squares of the other two sides

AC^2=AB^2+BC^2