98971 + Interview Questions in Primary School in Math

1.	-5 is one of the zeroes of 2x^2+px-15, zeroes of p(x^2+x)+kare equal to each other find k
Answer» p(-5)=0=2(-5)^2+(-5)p-15 0=50-15-5p 5p=35 p=7 f(X)=7(x^2+x)+k=0 7x^2+7x+k=0 As ROOTS are real and equal; Therefore; 0=D b^2-4ac=0 b^2=4ac (7)^2=4×7×k 49=28k 7=4k k=7/4 hope so it would be HELPFUL. If you find it helpful please mark it as brainliest...

Discussion

2.	Find the value of (– 12) × (– 3) × (+ 4) × (– 6)
Answer» (-12)(-3)(+4)*(-6)= -864

Discussion

3.	the angle of elevation of the top of a chimney from the top of a tower is 60° and the angle of depression of the foot of the chimney from the top of the tower is 30° if the height of the tower is 40m find the height of the chimney. According to pollution central norms the minimum height of a Smoke emitting chimney should be 100m.State of the height of the above mentioned chimney meets the pollution norms. What value is discussed in the question
Answer» SEE the image which i have attached and PLZ COMMENT if there is any problem.

Discussion

4.	If a and b are zeroes of polynomial x^2 + 7x + 7 , find the value of a^-1 + b^-1 -2ab.
Answer» Hey Here is your ANSWER, SUM of the ZEROES = a+b -b/a = -7 Product of the zeroes = an c/a = 7 =a^-1 + b^-1 -2ab =1/a+b -2an =1/-7 + 2x7 =1/-7 + 14 =-1/7+14 =-1+98/7 =97/7 Hope it HELPS you!

Discussion

5.	Simplify 1. (64)power 1/4 2. cube root of 243
Answer» 64 can be expressed as 2 power 4 so 64 power 1/4 is equal to 2 cube ROOT of 243 243 can be expressed as 3 cube so cube root of 243 is 3

Discussion

6.	If alpha,beta,gamma are the zeroes of kx^3-5x+9 and alpha^3+beta^3+gamma^3=27,find 'k'
Answer» By USING the RELATION between zeroes and coefficients, we have: alpha + BETA + gamma = -0/k = 0 alpha . beta . gamma = -9/k THEREFORE, alpha3 + beta3 + gamma3 = 3alpha . beta . gamma So, 27 = 3 x -9/k 27 = -27/k k = -1

Discussion

7.	When a sphere of radius 5cm is immersed in water filled in a cylinder,water rises by 5/3cm.Find cylinder's radius
Answer» Here in this PARTICULAR problem INCREASE in VOLUME of water in CYLINDER = volume of the sphere.

Discussion

8.	a bag contains 25 paise and 50 paise coins was total value is rupees 30 if the number of 25 paise coins in 4 times that of 50 paise coins find the number of each of type of coins
Answer» PLZ plz plz MARK as BRAINLIEST ANSWER

Discussion

9.	What should come in place of the question mark(?) in the following number series( i) 563 582 620 677 753 848 ?( ii ) 17 17 51 255 1785 16065 ?
Answer» 1ST ONE ANS i DONT THINK so its 10837

Discussion

10.	a train can go from burdwan to howrah in 6 hours and another train can go from howrah to burdwan in 4hours. Both of them start at 7 a.m. .When will they meet ?
Answer» Both TRAIN will MEET at 12 o 'clock

Discussion

11.	i came to play with 57marbles.At the end of game I have 34 marbles left. what is the gained no. of marbles
Answer» The total no of MARBLES GAINED is -23 because at the end of the game you had 34.

Discussion

12.	Factorise 13xsquare +37x-6
Answer» Hey Here is your answer, 13x^2 +39x-2x -6=0 13x(x+3) -2(x+3) =0 (X+3)(13x-2)=0 x = -3 x = 2/13 Hope it HELPS you!

Discussion

13.	यदि दो संख्याये किसी तीसरी संख्या से क्रमशः 30% तथा 40% अधिक है तो पहली संख्या दूसरी संख्या का कितना प्रतिशत है
Answer» Answer: The first number is approximately 92.857 % of the SECOND number. Step-by-step explanation: Let the THIRD number is x, ⇒ First number = 30 % more than the third number = 130 % of x = 1.3 x And, second number = 40 % more than the third number = 140 % of x = 1.4 x Thus, the percentage of first number to the second number $\frac{1.3x}{1.4x}\times 100$ $\frac{1300}{14}=92.8571428571\approx 92.857\%$ Hence, the first number is approximately 92.857 % of the second number.

13.

यदि दो संख्याये किसी तीसरी संख्या से क्रमशः 30% तथा 40% अधिक है तो पहली संख्या दूसरी संख्या का कितना प्रतिशत है

Answer»

Answer:

The first number is approximately 92.857 % of the SECOND number.

Step-by-step explanation:

Let the THIRD number is x,

⇒ First number = 30 % more than the third number

= 130 % of x

= 1.3 x

And, second number = 40 % more than the third number

= 140 % of x

= 1.4 x

Thus, the percentage of first number to the second number

$\frac{1.3x}{1.4x}\times 100$

$\frac{1300}{14}=92.8571428571\approx 92.857\%$

Hence, the first number is approximately 92.857 % of the second number.

Discussion

14.	As the sum of two integer is minus 6 if one of them is 2 then the other is
Answer» LET the FIRST integer=x the SECOND integer=2 according to question x+2= -6 x=-6-2=-8 So the VALUE of x=-8

Discussion

15.	Is 402 a term of sequence in 8,13,18,23..........?
Answer» 8,13,18,23......... a=8 d=13-8=5 an=402 an=a+(n-1)d 402=8+(n-1)5 402-8=(n-1)5 394/5=(n-1) 394/5+1=n 399/5=n 402 is not a TERM of the SEQUENCE.

Discussion

16.	What must 789 be multiplied by to given 7897890
Answer» You need to SEE if it is getting DIVISIBLE by some small NOS or not, if not then SIMPLY divide the no by the divisor to GET your answer. Let the no = x 789x= 7897890 x= 7897890/789 Thence 7897890/789= 10010

Discussion

17.	X2 - 11x - 80 factorise
Answer» HEY!!!! => x² - 11x - 80 = 0 => x² - 16x + 5x - 80 = 0 => x(x - 16) + 5(x - 16) = 0 => (x + 5)(x - 16) = 0 Thus x = -5 and x = 16 Today CSK will win Hope this helps ✌️

Discussion

18.	What is the mean proportional of 4 and 25
Answer» The MEAN of 4 and 25 is 14.5

Discussion

19.	How many sides in a regular polygon has if each of its interior angle is 135 degree
Answer» INTERIOR angle + exterior angle = 180º FInd exterior angle: 135 + exterior angle = 180 exterior angle = 180 - 135 exterior angle = 45º Find the number of sides: Sum of all exterior ANGLES = 360º Number of sides = 360 ÷ 45 = 8 sides Answer: It is a 8-sided polygon

19.

How many sides in a regular polygon has if each of its interior angle is 135 degree

Answer»

INTERIOR angle + exterior angle = 180º

FInd exterior angle:

135 + exterior angle = 180

exterior angle = 180 - 135

exterior angle = 45º

Find the number of sides:

Sum of all exterior ANGLES = 360º

Number of sides = 360 ÷ 45 = 8 sides

Answer: It is a 8-sided polygon

Discussion

20.	Rationalising the denominator of 22/2+√3+√5 step by step
Answer» Hi, 22/( 2 + √3 + √5 ) = [22(2+√3-√5)]/[(2+√3+√5)(2+√3-√5)] = [22(2+√3-√5)]/[(2+√3)²-(√5)²] =[22(2+√3-√5)]/[4+3+4√3-5] =[22(2+√3-√5)]/[2+4√3] =[11(2+√3-√5)]/[1+2√3] =[11(2+√3-√5)(2√3-1)]/[(2√3+1)(2√3-1)] =[11(4√3-2+6-√3-2√15+√5]/(12-1) = [11(4+3√3-2√15)]/11 = 4 + 3√3 - 2√15 I HOPE this helps you. : )

Discussion

21.	Construct PQR if PQ=5cm,
Answer» FIRST draw PQ 5 cm.Then draw angle PQR 105 degree By angle SUM property sum of 3 angles is 180 degree so,sum of angle Q ,R and P is 180 therefore,angle P will be 180 MINUS 105 plus 40 180 minus 145 is 35 degree so,angle P is equal to 35 degree then draw angle P and at last measure angle R hope it will be helpful for you....

Discussion

22.	A group of boys in a village bought a football costing Rs 121. If each boy contributed as many 25 paise coins as there were boys find the no. of boys
Answer» 1RUPEE= 100 paisa 121rupee=12100 paisa no. of BOYS is 12100÷25=484

Discussion

23.	75% of a number when added to 75 is equal to the number. The number is
Answer» LET x be the no. 75% x+75=x .....given 75x/100+75=x x-75x/100=75 (100x-75x)/100=75 25x/100=75 x/4=75 x=75×4 x=300 (Ans) PLZ MARK me as brainliest

Discussion

24.	3/5 of a road is to be resurfaced. if the road is 13/5 kilometers long. what length in kilometres is to be resurfaced
Answer» Hey!!!!! _________ TOTAL Length of the road = 13/5km Road to be RESURFACED = 3/5 $= > \frac{3}{5} \times \frac{13}{5}$ $= > \frac{39}{25} km$ Hope this HELPS ✌️

Discussion

25.	Find the 68 rational number between 1 by 3 and 4 by 8
Answer» I HOPE you UNDERSTAND........ this PIC...

Discussion

26.	For what value of a is the polynomial (2x³+ax²+11x+a+3) exactly divisible by (2x-1)?
Answer» LET 2x-1==o X=1\2 p(x)=2x^3+ax^2+11x+a+3 p(1\2)=2×(1\2)^3+a(1\2)^2+11\2+a+3 =1\4+a1\2+11\2+a+3=0 Taking LCM =(1+2a+22+4a+12)\4=0 =36+6a=0÷4 =a=-36\6 =a=-6 this is your ANSWER

Discussion

27.	Out of the group of 8 players, 3 players participate in the game. If there are 200 players in such a group, how many will participate in the game?
Answer» 33/8100 = 75/2 =37.5% 37.5% of 200 = 37.5/100200 = 75 PLAYERS

Discussion

28.	Find the cube root of 1331 by subtraction method
Answer» 11 is the CUBE ROOT........

Discussion

29.	What is nucleus how is it useful??
Answer» The central and most IMPORTANT part of OBJECT movement or group performing the basics for its ACTIVITY and GROWTH

Discussion

30.	a man could be 5 minutes late to reach its destination if he rides his bike at 30 km per hour but he would be 10 minutes early if he died at the speed of 40 km per hour what is the distance of his destination from the he starts?
Answer» 5 minute late distance 30 km 10 minutes early SPEED 40 km 10-5=5 40 km -30 km 10 km

Discussion

31.	Leela read 2 /5 parts of a book in 1 hours. How much parts of the book will she read in 9 /4 hours
Answer» 2/ 5 BOOK in 1 HR Hence in 9/4 hr she will read = 2 × 9 / 5 × 4 = 18 / 20 = 9 /10 parts Thanks

Discussion

32.	Hey guys can you do this
Answer» Heya friend here is the answer________________ it's quiet EASIER ,you will GET it soon-----> the theorem states that the angle formed at the center would be double of its opposite angle for eg:160=2x so double of X is equal to 160 ° so the value of x would be 160÷2=x 80=x so the answer is 80° hope it helps you mark as brainilist

Discussion

33.	Explain why 13233343563715 is composite number
Answer» Hey MATE: ''''''''''''''''''''''' There r many FACTORS for 13233343563715 .... So, that's y it is a composite no. Hope it hlpzzz...

Discussion

34.	Express 2.73 as rational number
Answer» 273/100 ...............

Discussion

35.	100×10+[400÷{100-(50-30)}]
Answer» 1005 is the answer. SOLVE fromm INNERMOST bracket.

Discussion

36.	Solve it.......The coordinates of the vertices of ∆ABC are A(4,1) , B(-3,2) and C(0,k) . Given that the area of ∆ABC is 12 units², find the value of k.
Answer» Hello friend i hope.. this one help U.. PLEASE MARK as brainlist.. Thanks.

Discussion

37.	Divide the largest 9 digit number formed by using digits from 1 to 9 by the largest 4 digit number using 3,5,7 and 9
Answer» It's CORRECT ANSWER is 999999999

Discussion

38.	the fore wheel of a carriage makes 6 revolution more than the rear wheel in going 120m .If the diameter of the fore wheel be increased by 1/4 its present and the daimeter of the rear wheel be increased by one-fifth of its present diameter than the fore wheel makes 4 revolution more than the rear wheel in going the same distance. find the circumference of each wheel of the carriage.
Answer» LET the DIAMETER of the forewheel and rear wheel be d1 and d2 respectively.The circumference of each wheel = 1 revolution. if the carrier goes 120m then, 120/ πd1 = 120/πd2 + 6 → (1) 120/π 5d1 /4= 120/ 6 πd2/5 + 4 → (2) simplifying each of the EQUATIONS we get, 20d2 = (20 d1 + d1d2 π) →(3) 24 d2 = (25d1+d2d1π) → (4) solving (3) and (1) d1 = (20d2/(20+d2π) substitute d1 in eq 4 (24d2)= (25 d2π(20d2/(20+d2π) solve for d2 now, d2 =5/ π d1= (20/5π)/ (20 +(5/π)π) = 4/π circumference c for forewheel is πd1 = 4m c for rear wheel is πd2 = 5M

Discussion

39.	The volume of sphere is 4851 cm cube then its diametrer is
Answer» The diameter of SPHERE is 21 cm. Given: The volume of sphere = $4851 cm ^{ 3 }$ To FIND: Diameter of sphere = ? Solution: The sphere is a “three dimensional” OBJECT which is perfectly round in shape of ball LIKE structure. Volume of sphere = $\frac{4}{3} \pi r^{3}$ $\begin{array}{l}{\frac{4}{3} \pi r^{3}=4851} \\ \\{r^{3}=\frac{4851 \times 3}{4 \times \pi}} \\ \\{r^{3}=\frac{14553}{12.564}} \\ \\{r^{3}=1158.309} \\ \\{r=\sqrt[3]{1158.309}}\end{array}$ r = 10.5 Diameter of the sphere = $2 \times radius =2 \times 10.5$ D = 21 cm

39.

The volume of sphere is 4851 cm cube then its diametrer is

Answer»

The diameter of SPHERE is 21 cm.

Given:

The volume of sphere = $4851 cm ^{ 3 }$

To FIND: Diameter of sphere = ?

Solution:

The sphere is a “three dimensional” OBJECT which is perfectly round in shape of ball LIKE structure.

Volume of sphere = $\frac{4}{3} \pi r^{3}$

$\begin{array}{l}{\frac{4}{3} \pi r^{3}=4851} \\ \\{r^{3}=\frac{4851 \times 3}{4 \times \pi}} \\ \\{r^{3}=\frac{14553}{12.564}} \\ \\{r^{3}=1158.309} \\ \\{r=\sqrt[3]{1158.309}}\end{array}$

r = 10.5

Diameter of the sphere = $2 \times radius =2 \times 10.5$

D = 21 cm

Discussion

40.	In inteagers++=what is answer
Answer» Answer: (+) x (+) = (+) Step-by-step explanation: While SOLVING PROBLEMS in MATHEMATICS about integers. We should learn BASIC rules. (+) x (+) = (+) (+) x (-) = (-) (-) x (+) = (-) (-) x (-) = (+) Examples :- +2+3 = +5 +2-3 = -1 -2+3 = 1 -2-2 = -4.

40.

In inteagers++=what is answer

Answer»

Answer:

(+) x (+) = (+)

Step-by-step explanation:

While SOLVING PROBLEMS in MATHEMATICS about integers.

We should learn BASIC rules.

(+) x (+) = (+)

(+) x (-) = (-)

(-) x (+) = (-)

(-) x (-) = (+)

Examples :-

+2+3 = +5

+2-3 = -1

-2+3 = 1

-2-2 = -4.

Discussion

41.	Factorise of polynomial x square - 22 X + 120
Answer» X^2 -22X + 120 x^2 - 10 x - 12x + 120 x (x-10) -12(x-10) (x-10)(x-12)

Discussion

42.	70+2×5+3 of 10-60÷6Give me full working
Answer» 70+10+3×10-10=83×0=0 is the RIGHT ANSWER..............

Discussion

43.	The value of (x-2y)(y-3x)+(x+y)(x-3y)-(y-3x)(4x-5y)
Answer» Hey here is your answer...☺️ (x - 2y)(y - 3X) + (x + y)(x - 3y) - (y - 3x)(4x - 5Y) (-3x^2 + XY - 2y^2 + 6xy) + (x^2 - 3xy +xy - 3y^2) - (4xy - 5y^2 - 12x^2 + 15xy.. - 3x^2 + 7xy - 2y^2 + x^2 - 2xy - 3y^2 - 4xy + 5y^2 + 12x^2 - 15xy (- 3x^2+12x^2 +x^2) - (2y^2 - 3y^2 + 12 y^2 )+(7xy - 2xy - 4xy - 15xy) 10x^2 +7y^2 - 14XY...Ans I HOPE IT WILL HELP YOU ☺️ thnx for asking ur QUESTION ✌️✌️

Discussion

44.	The population of a city decreased from 25000 to 24500 find the percentage decrease
Answer» HELLO THERE☺ FIRST TAKE OUT THE DIFFERENCE BETWEEN 25000 AND 24500 25000-24500=500 SO 500 TOTAL POPULATION DECREASED IS 500 PERCENTAGE = $\frac{500}{25000} \times 100 = 2$ THE DECREASED PERCENTAGE IS 2% HOPE IT HELPS ^_^

Discussion

45.	a bus covers a certain distance with uniform speed if the speed of the world would have been increased by 15 km per hour it would have taken 2 hours less to cover the same distance the speed of the boys would have been decreased by 5 km per hour it would have taken 1 hour more to cover the distance find the distance covered by the bus
Answer» Here UR ANSWEER!! HOPE HELP U jii☺☺

Discussion

46.	if the sum of two numbers is divided by 15 ,the quotient is 2 and the remainder is 10 if the difference of the same no is divided by 3 , then the quotient is 4 and the remainder is 2 find the numbers
Answer» Let the 2 numbers be a and b Given : a + b = 15(2) +10 a - b = 3(4) +2 So a + b = 40____(1) a - b = 14____(2) By (1) and (2) a + b -26 = a -b - 2B = -26 b = 13 So by (1) or (2) a = 27

Discussion

47.	The perimeter of an isosceles triangle is 24 cm the length of its congruent sides is 13 cm less than twice the length of its base. find the lenghts of all sides of the triangle
Answer» SOLUTION : LET the length of the base of the ISOSCELES TRIANGLE be x CM and the length of congruent sides be y cm. Then from the given conditions, Perimeter of triangle = 24 cm. ∴ x + y + y = 24 ∴ x + 2y = 24 ............. eq. no. (1) According to second condition, y = 2x – 13 ∴ 2x – y = 13 ................. eq. no. (2) Multiplying equation (2) by 2 we get 4x – 2y = 26 ................. eq. no. (3) Adding equation (1) and (3) x + 2y = 24 4x – 2y = 26 5x = 50 ∴ x = 50/5 ∴ x = 10 Substituting x = 10 in eq. (1) x + 2y = 24 ∴ 10 + 2y = 24 ∴ 2y = 24 – 10 ∴ 2y = 14 ∴ y = 14/2 ∴ y = 7.

Discussion

48.	If 2x+y=23 and 4x-y=19;find the value of x-3y and 5y-2x.
Answer» 2x+y = 23......(i)4x−y = 19.....(ii) ADDING both (i) and (ii) we GET; 2x+y+4x−y = 23+19⇒6x = 42⇒x = 426 = 7 Putting the VALUE of x in (i) we get; 2×7+y = 23⇒14+y = 23⇒y = 23−14 = 9 So the value of x - 3y is given by; x−3y=7−3×9 = 7−27 = −20 And the value of 5y - 2x is given by; 5y−2x = 5×9−2×7 = 45−14

Discussion

49.	you are a member of the hockey team of your school. today you got an opportunity to play for your school in an inter school hockey tournament. you played excellently and your team won . you and all your team mates are very happy. write a dairy entry in about 100 120 words describing the event and your feeling about this grand success
Answer» HOPE this HELPS you Please MARK as brainliest answer

Discussion

50.	If points (a, b), (a', b') and (a-a', b-b') are collinear then show that ab'=a'b
Answer» SEE the IMAGE which i have attached and plz comment if there is any problem in the SOLUTION.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

-5 is one of the zeroes of 2x^2+px-15, zeroes of p(x^2+x)+kare equal to each other find k

Find the value of (– 12) × (– 3) × (+ 4) × (– 6)

If a and b are zeroes of polynomial x^2 + 7x + 7 , find the value of a^-1 + b^-1 -2ab.

Simplify 1. (64)power 1/4 2. cube root of 243

If alpha,beta,gamma are the zeroes of kx^3-5x+9 and alpha^3+beta^3+gamma^3=27,find 'k'

When a sphere of radius 5cm is immersed in water filled in a cylinder,water rises by 5/3cm.Find cylinder's radius

a bag contains 25 paise and 50 paise coins was total value is rupees 30 if the number of 25 paise coins in 4 times that of 50 paise coins find the number of each of type of coins

What should come in place of the question mark(?) in the following number series( i) 563 582 620 677 753 848 ?( ii ) 17 17 51 255 1785 16065 ?

a train can go from burdwan to howrah in 6 hours and another train can go from howrah to burdwan in 4hours. Both of them start at 7 a.m. .When will they meet ?

i came to play with 57marbles.At the end of game I have 34 marbles left. what is the gained no. of marbles

Factorise 13xsquare +37x-6

यदि दो संख्याये किसी तीसरी संख्या से क्रमशः 30% तथा 40% अधिक है तो पहली संख्या दूसरी संख्या का कितना प्रतिशत है

As the sum of two integer is minus 6 if one of them is 2 then the other is

Is 402 a term of sequence in 8,13,18,23..........?

What must 789 be multiplied by to given 7897890

X2 - 11x - 80 factorise

What is the mean proportional of 4 and 25

How many sides in a regular polygon has if each of its interior angle is 135 degree

Rationalising the denominator of 22/2+√3+√5 step by step

Construct PQR if PQ=5cm,

A group of boys in a village bought a football costing Rs 121. If each boy contributed as many 25 paise coins as there were boys find the no. of boys

75% of a number when added to 75 is equal to the number. The number is

3/5 of a road is to be resurfaced. if the road is 13/5 kilometers long. what length in kilometres is to be resurfaced

Find the 68 rational number between 1 by 3 and 4 by 8

For what value of a is the polynomial (2x³+ax²+11x+a+3) exactly divisible by (2x-1)?

Out of the group of 8 players, 3 players participate in the game. If there are 200 players in such a group, how many will participate in the game?

Find the cube root of 1331 by subtraction method

What is nucleus how is it useful??

a man could be 5 minutes late to reach its destination if he rides his bike at 30 km per hour but he would be 10 minutes early if he died at the speed of 40 km per hour what is the distance of his destination from the he starts?

Leela read 2 /5 parts of a book in 1 hours. How much parts of the book will she read in 9 /4 hours

Hey guys can you do this

Explain why 13233343563715 is composite number

Express 2.73 as rational number

100×10+[400÷{100-(50-30)}]

Solve it.......The coordinates of the vertices of ∆ABC are A(4,1) , B(-3,2) and C(0,k) . Given that the area of ∆ABC is 12 units², find the value of k.

Divide the largest 9 digit number formed by using digits from 1 to 9 by the largest 4 digit number using 3,5,7 and 9

The volume of sphere is 4851 cm cube then its diametrer is

In inteagers++=what is answer

Factorise of polynomial x square - 22 X + 120

70+2×5+3 of 10-60÷6Give me full working

The value of (x-2y)(y-3x)+(x+y)(x-3y)-(y-3x)(4x-5y)

The population of a city decreased from 25000 to 24500 find the percentage decrease

if the sum of two numbers is divided by 15 ,the quotient is 2 and the remainder is 10 if the difference of the same no is divided by 3 , then the quotient is 4 and the remainder is 2 find the numbers

The perimeter of an isosceles triangle is 24 cm the length of its congruent sides is 13 cm less than twice the length of its base. find the lenghts of all sides of the triangle

If 2x+y=23 and 4x-y=19;find the value of x-3y and 5y-2x.

If points (a, b), (a', b') and (a-a', b-b') are collinear then show that ab'=a'b