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2701.

In the given figure, seg AD ⊥ seg BC. seg AE is the bisector of ∠CAB and C - E - D. Prove that∠DAE = 12∠C - ∠B

Answer»


In the given figure, seg AD seg BC. seg AE is the bisector of CAB and C - E - D. Prove that


DAE = 12C - B





2702.

The calculated mean of 50 observations was 80. It was later discovered that observation 19 was recorded by mistake as 91. What was the correct mean?

Answer»
The calculated mean of 50 observations was 80. It was later discovered that observation 19 was recorded by mistake as 91. What was the correct mean?
2703.

A bag contains 50 coins and each coin is marked from 51 to 100. One coin is picked at random. The probability that the number on the coin is not a prime number, is(a) 15(b) 35(c) 25(d) 45

Answer» A bag contains 50 coins and each coin is marked from 51 to 100. One coin is picked at random. The probability that the number on the coin is not a prime number, is



(a) 15



(b) 35



(c) 25



(d) 45
2704.

If k is ratio of zeroes of the polynomial 4x2−5x−3, then the value of (k+1k)−2 is

Answer»

If k is ratio of zeroes of the polynomial 4x25x3, then the value of (k+1k)2 is

2705.

Choose the rational number which does not lie between -23 and -15.(a) -310(b) 310(c) -14(d) -720

Answer» Choose the rational number which does not lie between -23 and -15.

(a) -310



(b) 310



(c) -14



(d) -720
2706.

The line y - x = 0, passes through the point ___.

Answer»

The line y - x = 0, passes through the point ___.



2707.

Find the coordinates of points on the straight line x+y=4 which are at unit distance from the line 4x+3y=10.

Answer» Find the coordinates of points on the straight line x+y=4 which are at unit distance from the line 4x+3y=10.
2708.

Plz explain the emperical formula of mode: 3median -- 2 mean. Prove it

Answer» Plz explain the emperical formula of mode: 3median -- 2 mean. Prove it
2709.

It is given that for the function f(x) = x3 - 6x2 + ax + b on [1, 3], Rolle's theorem holds with c = 2+13. If f(1) = f(3) = 0, then a =_______, b =________.

Answer» It is given that for the function f(x) = x3 - 6x2 + ax + b on [1, 3], Rolle's theorem holds with c = 2+13. If f(1) = f(3) = 0, then a =_______, b =________.
2710.

A glass cube of side length 'a' and p = 1.5 isplaced on a surface. A small light bulb is at thecentre of base of cube. What minimum area of sidewall of the cube should be painted so that no lightcomes out of the side walls of the cube? (Consideronly single reflection or refraction)

Answer» A glass cube of side length 'a' and p = 1.5 is
placed on a surface. A small light bulb is at the
centre of base of cube. What minimum area of side
wall of the cube should be painted so that no light
comes out of the side walls of the cube? (Consider
only single reflection or refraction)
2711.

The zeroes of the polynomial x2−x−12 is

Answer»

The zeroes of the polynomial x2x12 is


2712.

The simplified form of 2√5+√3+1√3+√2−3√5+√20

Answer» The simplified form of 25+3+13+235+2
  1. 0
2713.

A cube is a three-dimensional figure as shown in the given figure. It has six faces and all of them are identical squares. The length of an edge of the cube is given by l. Find the formula for the total length of the edges of a cube.

Answer» A cube is a three-dimensional figure as shown in the given figure. It has six faces and all of them are identical squares. The length of an edge of the cube is given by l. Find the formula for the total length of the edges of a cube.


2714.

I have a certain number of chocolates. My friend has 4 more than twice the number of chocolates I have. Which of the following equations depicts the relation between the number of chocolates with me and my friend?(Assume x as number of chocolates I have and y as number of chocolates my friend has.)

Answer»

I have a certain number of chocolates. My friend has 4 more than twice the number of chocolates I have. Which of the following equations depicts the relation between the number of chocolates with me and my friend?

(Assume x as number of chocolates I have and y as number of chocolates my friend has.)

2715.

Evaluate:cosec 31∘−sec59∘

Answer» Evaluate:

cosec 31sec59
2716.

The students of Vidyalaya were asked to participate in a competition for making and decorating penholders in the shape of a cylinder with a base, using cardboard. Each penholder was to be of radius 3 cm and height 10.5 cm. The Vidyalaya was to supply the competitors with cardboard. If there were 35 competitors, how much cardboard was required to be bought for the competition? [Assume π=227]

Answer» The students of Vidyalaya were asked to participate in a competition for making and decorating penholders in the shape of a cylinder with a base, using cardboard. Each penholder was to be of radius 3 cm and height 10.5 cm. The Vidyalaya was to supply the competitors with cardboard. If there were 35 competitors, how much cardboard was required to be bought for the competition? [Assume π=227]
2717.

What is likely to happen if during constructing perpendicular to a given line segment AB, the first choice of arc radius is not taken more than half of AB?

Answer» What is likely to happen if during constructing perpendicular to a given line segment AB, the first choice of arc radius is not taken more than half of AB?
2718.

Plot the points (3,5) and (−1, 3) on a graph paper and verify that the straight line passing through these points also passes through the point (1, 4).

Answer» Plot the points (3,5) and (−1, 3) on a graph paper and verify that the straight line passing through these points also passes through the point (1, 4).
2719.

where n, m are non-negative integers. Then x has a decimal expansion which ___________________

Answer»

where n, m are non-negative integers. Then x has a decimal expansion which ___________________


2720.

If (x-1) is a factor of ax - a, then find the value of a

Answer»

If (x-1) is a factor of ax - a, then find the value of a


2721.

You picked a card at random from a deck of 52, noted the suit of the card, and then replaced the card. You repeated this experiment 99 more times. Your observations are as shown below. SuitFrequencySpades23Diamond26Club21Heart30 Find the probability of drawing (i) Spades ii) Diamonds (iii) Clubs (iv) Hearts. Show that the sum of these probabilities is 1. [4 MARKS]

Answer»

You picked a card at random from a deck of 52, noted the suit of the card, and then replaced the card. You repeated this experiment 99 more times. Your observations are as shown below.

SuitFrequencySpades23Diamond26Club21Heart30

Find the probability of drawing
(i) Spades
ii) Diamonds
(iii) Clubs
(iv) Hearts.
Show that the sum of these probabilities is 1. [4 MARKS]

2722.

33. In triangle ABC,segAB = SegA C & P is any points on AC.Through C, a line is drawn to intersect BP produced in Q such that ANGLE ABQ=ANGLE ACQ .Prove that ANGLE AQC=90^° +1/2 ANGLE BAC.

Answer» 33. In triangle ABC,segAB = SegA C & P is any points on AC.Through C, a line is drawn to intersect BP produced in Q such that ANGLE ABQ=ANGLE ACQ .Prove that ANGLE AQC=90^° +1/2 ANGLE BAC.
2723.

In the next six questions there is no negative marking. The best answer carries one mark while other answer choices carry less than one mark. Q80. You are the chief manager of an important project. There are six fairly independent parts of the project requiring different mix of skill set and knowledge base. The six parts are handled by different team leaders. At this time four of the teams are progressing well with their assigned parts. However, two teams are behind schedule and if this state of affairs continues the project would have time overrun. Part of the problem lies in the fact that some staff members in these two behind schedule teams have left the organization without replacement. In the situation what action should you take? 1. Talk to the two teams to collectively analyses what is the problem. 2. Hold the two team leaders to be responsible for delay and think of replacing them. 3. Inform higher management about the developments and request filling the vacant positions. 4. Explore the possibility of outsourcing some part of the work.

Answer»

In the next six questions there is no negative marking. The best answer carries one mark while other answer choices carry less than one mark.

Q80. You are the chief manager of an important project. There are six fairly independent parts of the project requiring different mix of skill set and knowledge base. The six parts are handled by different team leaders. At this time four of the teams are progressing well with their assigned parts. However, two teams are behind schedule and if this state of affairs continues the project would have time overrun. Part of the problem lies in the fact that some staff members in these two behind schedule teams have left the organization without replacement. In the situation what action should you take?

1. Talk to the two teams to collectively analyses what is the problem.

2. Hold the two team leaders to be responsible for delay and think of replacing them.

3. Inform higher management about the developments and request filling the vacant positions.

4. Explore the possibility of outsourcing some part of the work.


2724.

Represent the following numbers as integers with appropriate signs: Withdrawal of rupees seven hundred.

Answer» Represent the following numbers as integers with appropriate signs: Withdrawal of rupees seven hundred.
2725.

Question 1 In the figure, PSDA is a parallelogram. Points Q and R are taken on PS such that PQ = RS and PA || QB || RC. Prove that ar (PQE) = ar (CFD).

Answer» Question 1
In the figure, PSDA is a parallelogram. Points Q and R are taken on PS such that PQ = RS and PA || QB || RC. Prove that ar (PQE) = ar (CFD).

2726.

∆ABC, in which angle A equal to 90 degree and AC equal to AC then find the angle

Answer»

∆ABC, in which angle A equal to 90 degree and AC equal to AC then find the angle

2727.

In Fig. X and Y are two points on equal sides AB and AC of a ΔABC such that AX = AY. Prove that XC = YB. [2 MARKS]

Answer»

In Fig. X and Y are two points on equal sides AB and AC of a ΔABC such that AX = AY. Prove that XC = YB. [2 MARKS]



IMG



2728.

Two lines AB and CD intersect at O such that BC is equal and parallel to AD. Prove that the lines AB and CD bisect at O.

Answer» Two lines AB and CD intersect at O such that BC is equal and parallel to AD. Prove that the lines AB and CD bisect at O.
2729.

Sum of the squares of adjacent sides of a parallelogram is 130 sq.cm and length of one of its diagonals is 14 cm. Find the length of the other diagonal.

Answer» Sum of the squares of adjacent sides of a parallelogram is 130 sq.cm and length of one of its diagonals is 14 cm. Find the length of the other diagonal.
2730.

What is 121169−32?

Answer»

What is 12116932?


2731.

Look at words and the codes related to them in the image. In the same way, find the codes for the words given below:DUCK, GUARD, TIGER, PHONE and SKY

Answer»

Look at words and the codes related to them in the image. In the same way, find the codes for the words given below:

DUCK, GUARD, TIGER, PHONE and SKY
2732.

The supplement of a right angle is ___.

Answer»

The supplement of a right angle is ___.

2733.

It is proposed to insert a circular curve of radius 300 m with a transition curve of 90 m length at each end. The spiral angle and central angle are respectively:(Deflection angle = 40∘)

Answer»

It is proposed to insert a circular curve of radius 300 m with a transition curve of 90 m length at each end. The spiral angle and central angle are respectively:

(Deflection angle = 40)

2734.

Question 1 (vi)Without actually performing the long division, state whether 2323× 52 will have a terminating decimal expansion or a non-terminating repeating decimal expansion.

Answer»

Question 1 (vi)

Without actually performing the long division, state whether 2323× 52 will have a terminating decimal expansion or a non-terminating repeating decimal expansion.



2735.

A cube of side length 5 cm is to be polished, what is the total area which needs to be polished?

Answer» A cube of side length 5 cm is to be polished, what is the total area which needs to be polished?


2736.

Rain water which falls on a flat rectangular surface of length 6 m and breadth 4 m is transferred into a cylindrical vessel of internal radius20 cm. What will be the height of water in the cylindrical vessel if the rainfall is 1 cm. Give your answer to the nearest whole number.(Use π = 3.14)

Answer» Rain water which falls on a flat rectangular surface of length 6 m and breadth 4 m is transferred into a cylindrical vessel of internal radius

20 cm. What will be the height of water in the cylindrical vessel if the rainfall is 1 cm. Give your answer to the nearest whole number.

(Use π = 3.14)
2737.

In ΔABC,∠A=45∘, ∠B=60∘ and ∠C=75∘. The angles of the triangle formed by joining the mid-points of the sides of this triangle are

Answer»

In ΔABC,A=45, B=60 and C=75. The angles of the triangle formed by joining the mid-points of the sides of this triangle are


2738.

Question 11Find the values of a and b in each of the following(i)5+2√37+4√3=a−6√3(ii)3−√53+2√5=a√5−1911(iii)√2+√33√2−2√3=2−b√6(iv)7+√57−√5−7−√57+√5=a+711√5b

Answer» Question 11

Find the values of a and b in each of the following

(i)5+237+43=a63

(ii)353+25=a51911

(iii)2+33223=2b6

(iv)7+575757+5=a+7115b
2739.

Consider the following two statements:Statement - 1: If two figures have same shape and same size then they are called congruent.Statement - 2: If two figures have equal area they are called congruent.Now, choose the correct option.

Answer»

Consider the following two statements:

Statement - 1: If two figures have same shape and same size then they are called congruent.

Statement - 2: If two figures have equal area they are called congruent.

Now, choose the correct option.



2740.

When a polynomial is divided by (x+2), the quotient and remainder are (2x-1) and 3 respectively.

Answer»

When a polynomial is divided by (x+2), the quotient and remainder are (2x-1) and 3 respectively.

2741.

Three coins were tossed thirty times. Each time the number of heads occurring was noted as follows: 0, 1, 2, 2, 1, 2, 3, 1, 3, 0 1, 3, 1, 1, 2, 2, 0, 1, 2, 1 3, 0, 0, 1, 1, 2, 3, 2, 2, 0 The frequency distribution table for the given data will be

Answer»

Three coins were tossed thirty times. Each time the number of heads occurring was noted as follows:

0, 1, 2, 2, 1, 2, 3, 1, 3, 0

1, 3, 1, 1, 2, 2, 0, 1, 2, 1

3, 0, 0, 1, 1, 2, 3, 2, 2, 0

The frequency distribution table for the given data will be


2742.

Which of the following is always irrational?

Answer»

Which of the following is always irrational?



2743.

In the given figure, if ∠ACB:∠ABC=1:4,then ∠OAD is

Answer»

In the given figure, if ACB:ABC=1:4,

then ∠OAD is




2744.

Draw graph for following y=1-x^2y=-lnxy=ln(x-1)y=1-{x

Answer» Draw graph for following
y=1-x^2
y=-lnx
y=ln(x-1)
y=1-{x
2745.

The given figure shows a coloured region in a circle. If the coloured part is compared with the full circle, what is the ratio of the coloured part to the full circle?

Answer»

The given figure shows a coloured region in a circle.



If the coloured part is compared with the full circle, what is the ratio of the coloured part to the full circle?



2746.

draw the graphs of 3x+2y=6 and 2x+y=4. shade the region bounded by the lines and the x-axis.

Answer» draw the graphs of 3x+2y=6 and 2x+y=4.
shade the region bounded by the lines and the x-axis.
2747.

Find the area of an equilateral triangle having altitude h cm.

Answer»

Find the area of an equilateral triangle having altitude h cm.


    2748.

    Four rational numbers between 3 and 4 are:

    Answer»

    Four rational numbers between 3 and 4 are:

    2749.

    Factorise: x2+1235x+135

    Answer»

    Factorise:

    x2+1235x+135

    2750.

    Find the value of x in each of the following:(i) 3√4x−7−5=0 (ii) 4√3x+1=2

    Answer» Find the value of x in each of the following:

    (i) 34x75=0 (ii) 43x+1=2