332354 + Interview Questions in Secondary School in Math

1.	If A = {1, 2, 3, 4, 5}, write the relation a R b such that a + b = 8, a ,b € A. Write the domain, range & co-domain.
Answer» $\textbf{Given:}$ $\mathsf{A=\{1,2,3,4,5\}}$ $\mathsf{aRb\iff\,a+b=<klux>8</klux>}$ $\textbf{To find:}$ $\textsf{Doamin, Range and codomain}$ $\textbf{Solution:}$ $\mathsf{aRb\iff\,a+b=8}$ $\mathsf{3+5=8\implies\;_3R_5}$ $\mathsf{4+4=8\implies\;_4R_4}$ $\mathsf{5+3=8\implies\;_5R_3}$ $\therefore\mathsf{<klux>R</klux>=\{(3,5),(4,4),(5,3)\}}$ $\mathsf{Domain=\{3,4,5\}}$ $\mathsf{Range=\{3,4,5\}}$ $\mathsf{Co-domain=\{1,2,3,4,5\}}$ $\textbf{Find more:}$ If R = {X, y)/x = 2y} is a RELATION defined on A = {1, 2, 3, 4, 6, 7, 8} then write all elements of R Also brainly.in/question/19887787 Find the domain and range of the relation, R = ( (x, y) : x,y e Z, xy = 4} brainly.in/question/20462070

1.

If A = {1, 2, 3, 4, 5}, write the relation a R b such that a + b = 8, a ,b € A. Write the domain, range & co-domain.

Answer»

$\textbf{Given:}$

$\mathsf{A=\{1,2,3,4,5\}}$

$\mathsf{aRb\iff\,a+b=<klux>8</klux>}$

$\textbf{To find:}$

$\textsf{Doamin, Range and codomain}$

$\textbf{Solution:}$

$\mathsf{aRb\iff\,a+b=8}$

$\mathsf{3+5=8\implies\;_3R_5}$

$\mathsf{4+4=8\implies\;_4R_4}$

$\mathsf{5+3=8\implies\;_5R_3}$

$\therefore\mathsf{<klux>R</klux>=\{(3,5),(4,4),(5,3)\}}$

$\mathsf{Domain=\{3,4,5\}}$

$\mathsf{Range=\{3,4,5\}}$

$\mathsf{Co-domain=\{1,2,3,4,5\}}$

$\textbf{Find more:}$

If R = {X, y)/x = 2y} is a RELATION defined on A = {1, 2, 3, 4, 6, 7, 8} then write all elements of R Also

brainly.in/question/19887787

Find the domain and range of the relation,

R = ( (x, y) : x,y e Z, xy = 4}

brainly.in/question/20462070

Discussion

2.	What is equal to 12 1/2% of 80?
Answer» Hi , Let X = 12½ % of 80 x = 25/2 % × 80 x = 25/200 × 80 x = 80/8 x = 10 I hope this helps you. : )

Discussion

3.	101x 99 using algebraic identity
Answer» 101×99 = (100+1)(100-1) =(100×100)-(1×1) =10000-1 =9999 here the IDENTITY USED is (a+b) (a-b)= a^2- b^2

Discussion

4.	Simplify by rationalizing the denomiatotor : 1 by 2√7-√5
Answer» 0

Discussion

5.	Arithmetic operators definition
Answer» Quotient = DIVISOR + dividend ^ remainder hope u GOT the answer my friend

Discussion

6.	if the straight line x y - x - y + 1 = 0 and the line x + ay - 3 =0 are concurrent then the acute angle between the pair of lines ax2-13xy-7y2+X+23y-6=0 is
Answer» I HOPE this ANSWER HELP you

Discussion

7.	This is not a question this is game .you just imagine any number except 0 .you thought okay add it with 5 and again add with 10 and add with 15 okay.now subtract the u thought before and with the answer you get. hmm u got the answer mm it is 30.thx for seeing this cheers
Answer» OMG......, it WORKS....... BRAVO

Discussion

8.	Please help me to solve this...... complete steps...11th standard
Answer» HI...☺ Here is your ANSWER...✌ GIVEN THAT, $f(x) = log \frac{1 + x}{1 - x} \:\:\: \:\:\: .....(1)\\$ TO PROVE : $f( \frac{2x}{1 + {x}^{2} } ) = 2f(x) \\$ PROOF : LHS $f( \frac{2x}{1 + {x}^{2} }) = log \: \frac{1 + \frac{2x}{1 + {x}^{2} } }{1 - \frac{2x}{1 + {x}^{2} } } \\ \\ = log \: \frac{ \frac{1 + {x}^{2} + 2x }{1 + {x}^{2} }}{ \frac{1 + {x}^{2} - 2x}{1 + {x}^{2} } } \\ \\ = log \: \frac{1 + {x}^{2} + 2x }{1 + {x}^{2} - 2x } \\ \\ = log \: \frac{{(1 + x )}^{2} }{{(1 - x)}^{2} } \\ \\ = log \: {( \frac{1 + {x}}{1 - x} ) }^{2} \\ \\ = 2 \: log( \frac{1 + x}{1 - x} ) \: \: \: \: \: \: \: \: \: [ \because log( {a})^{b} = b log(a) ] \\ \\ = 2f(x) \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: [from \: (1)] \\$ = RHS [ Proved ]

Discussion

9.	Solve these q plz fast I need help
Answer» Hey friend, Here is the answer you were LOOKING for: (Answer in attachment) (NOTE : Due to LACK of space, I was not able to ATTACH the explanation of the question 3rd. HOPE you'll understand my problem And I'm extremely sorry for that but we can't attach more than 5 images) Hope this helps!!! If you have any doubts regarding to my answer, feel free to ask in comment section or you can also inbox me. @Mahak24 Thanks... ☺☺

Discussion

10.	the shadow of a tree is 8m while the Shadow of a stick of length 3m is 2m find the height of the tree
Answer» TAN A=3/2 at same TIME tanA=X/8 ALSO here x is HEIGHT of tree now 3/2=×/8 2x=3×8 x=12 m

Discussion

11.	A boat takes 10 hours to travel 30 km upstream and 44 km downstream find speed of stream and speed of boat in still water . find in 2 seconds trick
Answer» It will HELP you out of the DAY

Discussion

12.	Ab cut 7.8 cm. n ac cut 4.3 from the bc is
Answer» The ANSWER is 12.1 I THINK

Discussion

13.	(-10)+3=10-3 is true or false
Answer» False as in the LHS side the ANSWER is -7 but in the RHS side if we change the sign then it becomes 7 so it is false it can be WRITTEN as -10+3 = 3-10 hope it HELPS you mark as brainlest if it helps you

Discussion

14.	A body travels along a straight line with speed V¹ for time t¹ and other distance with speed V² for the t² in the same direction. Find the average speed of the body.
Answer» HERE IS THE SOLUTION; ◆Let, the total distance covered by the PARTICLE during the complete journey is 2x. ◆If The half distance (x) covered with the speed v1 in T1 TIME. ◆Using formula of speed, v1=x/t1 so, t1= x/v1 ◆And another half distance (x), covered with speed v2 in time t2. so, v2=x/t2 t2=x/v2 ◆AVERAGE VELOCITY = Total distance /Total time ◆Total time= t1+t2 = x/v1 + x/v2 =(v2x+v1x)/v1v2 ◆Total distance = x+x=2x ◆On PUTTING the values of total distance and total time in the formula of average speed, we get ◆Average speed= 2x /(v2x+v1x / v1v2) = 2v1v2 /(v1+v2) HOPE IT HELPS

Discussion

15.	√2*√3 what will be the answer of this:-
Answer» √6........if its into....

Discussion

16.	2+2+46+895679+864+542+89+=
Answer» 2+2+46+895679+864+542+89=897224

Discussion

17.	the average temperature of the first three days of a week is 26.5 degree and that next three days is 29 degree celsius.i f the weekly average is 27.4 degree celsius then what's the temperature of the last days
Answer» Let last temperature is X Total average = (1ST avg + 2nd avg + x) / 3 27.4 = (26.5 + 29 + x)/ 3 82.2 = 55.5 + x x = 26.7 degree 7th DAY TEMPERATUR is 26.7 degree Thanks

Discussion

18.	a car travels first half distance with a uniform speed U and next half distance with uniform speed V. Find the average speed?
Answer» AVERAGE SPEED is = (U + V) / 2

Discussion

19.	What will be the result if we do the following - 26-48+(96×73)-72-(952)
Answer» HEY FRIEND the ANSWER will be 5962. HOPE you LIKE it

Discussion

20.	This one ch 1 number system Q10
Answer» HOPE this HELPS you.......

Discussion

21.	Parts and wholes - fraction
Answer» Hey Mate Here is your ANSWER in the attachment Hope it HELPS Cheers!! Pls MARK as BRAINLIEST if it helps

Discussion

22.	The distance by road between two towns A and B, is 216 km, and by rail it is 208 km. A car travels at a speed of x km/hr, and the train travels at a speed which is 16 km/h faster then the car. Calculate : the time taken by the car to reach town B from A in terms of x, the time taken by the train to reach town B from A in terms of x, if the train takes 2 hours less than the car to reach town B obtain an equation in x and solve it , hence find the speed of the train.
Answer» THERE IS THE SOLUTION. HOPE IT HELPS

Discussion

23.	if the price of kerosene is raised by 10%, by how much percent must a person reduce his consumption of kerosene so that his expenditure remains the same.
Answer» We have, KEROSENE rate is increased by 10%. So let the CURRENT price of kerosene be x. Increased price = x+(10/100x) Let the PERSONS consumption be y. So in order to keep his expenditure he must reduce his consumption also by 10%. Mathematically, x+(10/100x)=y-(10/100*y) Hence, The PERSON must reduce his consumption by 10%. Hope it HELPS!

Discussion

24.	Write an AP whose first term and common difference are-1,25 and -0,25
Answer» -1.25,-1.50,-1.75............

Discussion

25.	The adjacent sides of a parallelogram are 15cm and 8cm. If the distance between the longer sides is 4cm, find the distance between the shorter sides.
Answer» Given bigger side as BASE =15cm smaller side as base=8CM distance (HEIGHT) between the longer side =4cm =15×4=60 area of parallelogram = $60cm {}^{2}$ area of parallelogram =base(8cm) ×height 60=8×height height=60/8=15/2=7.5cm, HENCE the distance between the shorter side is 7.5 cm hope it helps you

Discussion

26.	A bed sheet was sold for 489 rupees there by gaining 15% find the cost price of bed sheet
Answer» HEY, -------------------------------------------------------------------------------------------------------- 15% of 489 = 73.35 then the C.P. = 489-73.35 =415.65 ANS THANKS

Discussion

27.	Find two irrational number between 1.1 and 1.11
Answer» The 2 irrational numbers between 1.1 and 1.11 is 1.1000000000856743........... and 1.1000000000009645372....... . In this way you can find as MANY as you WANT but those numbers should be greater than first number and less than the SECOND number.

Discussion

28.	6 minus 4 root 3 upon 6 + 4 root 3
Answer» Hii friend, 6-4✓3/6+4✓3 => 6-4✓3/6+4✓3 × 6-4✓3/6-4✓3 => (6-4✓3)(6-4✓3)/(6+4✓3)(6-4✓3) => (6-4✓3)²/(6)² - (4✓3)² => (6)² +(4✓3)² - 2 × 6 × 4✓3/36- 48 => 36 + 48 - 12 × 4✓3/-12 => 84 - 48✓3/-12 => 4(21-12✓3)/-12 => 21-12✓3/-3 => 21-12/-✓3 => 21-12/-✓3 × ✓3/✓3 => 21✓3-12✓3/-3 => 9✓3/-3 = 3✓3/-1.... HOPE IT WILL HELP YOU.... :-)

Discussion

29.	If two zeroes of the polynomialare and find its third zero.want even steps please
Answer» Hey there ‼ ______________________________ Since TWO given zeroes of given polynomial are 3 and –3. x = √3 or x = – √3 ( x – √3 ) ( x + √3 ) = 0 x² – 3 is a factor of given polynomial. Refer to the attachment for division. x³ – 4x² – 3x + 12 = ( x – 4 ) ( x – √3 ) ( x + √3 ) Thus, the zeroes of polynomial are √3, –√3 and 4. Answer - 4 is the THIRD ZERO of the given polynomial. ______________________________ Hope my ans.'s SATISFACTORY. (^-^)

Discussion

30.	10011001 to octal and base 5
Answer» But KRNA KYA H. ... . ...

Discussion

31.	Hots question. no:3 solve
Answer» LET's SOLVE it by Arithmetic Progression. This series will form an A.P as first term is 1, SECOND is 3 , third is 5 and so on. By this way the common difference will be 2. Given, a = 1 common difference = 2 Number of terms = 13. Sum of all terms = N/2 [ 2a + ( n - 1 ) d ] = 13 / 2 [ 2 * 1 + ( 13 - 1 ) 2 ] =13 / 2 [ 2 + 12 * 2 ] = 13 / 2 ( 2 + 24 ) = 13 / 2 * 26 = 13 * 13 = 169.

Discussion

32.	Find the average of 11 consecutive odd nos a, b, c,d,e,f,g,hi,j,k. ?
Answer» Let 1st ODD no. be = x then nxt are following x+2, x+4, x+6.............x+20 so AVERAGE= (x+x+2+x+4................+x+20)÷11 = 11x+110/11 =x+10 so in the TERM of a,b,C,d.......j,k average= a+10

Discussion

33.	(10011001) to octal and base 5
Answer» Hey MATE ☺ {SEE THE PICTURE} HOPE it helps ☺

Discussion

34.	What is "DE MOIVE'S LAW" ?
Answer» De Moivre's LAW. ... De Moivre's Law is a SURVIVAL MODEL APPLIED in actuarial science, named for Abraham de Moivre. It is a simple law of mortality BASED on a linear survival function.

Discussion

35.	in a factory the ratio of salary of skilled and unskilled workers is 5.3 total salary of one day of both them is 720 rupees find daily wages of skilled and unskilled worker
Answer» LET the ADD the two ratio proportion i.e. 5 + 3 = 8 Divide 720 by 8 i.e. (720 / 8 ) = 90 So, wages of the skilled workers is 5 X 90 = 450 and wages of the unskilled works is 3 x 90 = 270

Discussion

36.	a car moves through 120 km at a speed of 40 km per hour and return back at a speed of 60 km per hour calculate its average speed
Answer» Hope this may help you PLEASE LET me know the CORRECT ANSWER if given in your text book

Discussion

37.	the population of a town increases by 10% every year at present the population of the town is 363000 what was the population of the town 2 years back
Answer» 363000= P( 1-r/100)^n 363000= p( 1-10/100)^2 363000= p( 9/10×9/10) p= 363000×100/81= 448148 ( APPROX)

Discussion

38.	X equal to zero by equal to minus 12 butter 15 Z equal to 12:35
Answer» ....... SORRY i don't KNOW

Discussion

39.	The condition if two circles of equal radii cut orthoganlly
Answer» TWO circles with equal RADIUS pass through CENTRE of each other as shown in FIGURE. If radius = r, the area of the overlapping region would be: Circle.jpg (14.68 KiB) Viewed 27767 times A: 2π r 2 − 3 √ 2 2πr2−32 B: 2π r 2 − π 8 2πr2−π8 C: r 2 ( 4π 3 − 3 √ 4 ) R2(4π3−34) D: r 2 ( π 3 − 2 √ ) r2(π3−2) E: r 2 ( 2π 3 − 3 √ 2 ) r2(2π3−32)

Discussion

40.	the cost of 1 metre of cloth is rupees 25 by 1 by 5 what is the cost of 5 by 5.9 metre of cloth? Of fractions lesson is fraction ok I want correct answer ok thanks
Answer» COST of 1 m CLOTH=25×1×5=125 cost of 5 by 5.9 m cloth= 5.9×5×125 =₹3687.5 ANS

Discussion

41.	Change the sentence from comparitive to Positive- The pen is mightier that the sword.
Answer» The SWORD is not so MIGHTY as the PEN..

Discussion

42.	Expand it (3d - 5 ) (4 - d )
Answer» (3D-5)(4-d) = 3d(4-d)-5(4-d) = 12d-3d²-20+5d = -3d²+12d+5d-20 = -3d²+17d-20

Discussion

43.	What is the size for leave application form of paper?URGENTpls help
Answer» A4 SIZE paper THIS IS THE CORRECT ANSWER SO MARK BRAINLIEST ✌️

Discussion

44.	Expand it 10a(2a-b)
Answer» HEY!!!! __________ Let's EXPAND => 10a( 2A - b ) => 20a² - 10ab _________ Hope this helps ✌️

Discussion

45.	ABC is An isosceles triangle, PQR is a equilateral triangle within ABC then find angle 'a'.
Answer» In equalateral all SIDE are equal but in ISOSCELES triangle only two side are equal ext angle +INT angle =180 so x+x+60+60=180. 2x+120=180. 2x=180-120. 2x=60. X=60upon2. X=30 so A=30

Discussion

46.	Percentage35 ka 25%
Answer» 35/4= 8.75 So your ANS. Is 8.75

Discussion

47.	Please answer simplify the following
Answer» DONE with all...................

Discussion

48.	2 racing cars acquire velocities 18kmph and 36kmph in 0.5 sec if they are accelerated uniformly from rest find their accelarations
Answer» For first car, Initial velocity ( U ) = 0. Final velocity ( v ) = 18 km/h = 5 m/s. Time ( t ) = 0.5 sec Acceleration ( a ) = ( v - u ) / t = ( 5 m/s - o ) / 0.5 s = 5 m/s / 0.5 s = 5 * 10 m / 5 s ^ 2 = 10 m / s ^ 2 = 10 m s ^ -2. For second car, Initial velocity ( u ) = o. Final velocity ( v ) = 36 km/h = 10 m/s. Time ( t ) = 0.5 s Acceleration ( a ) = ( v - u ) / t = ( 10 m/s - o ) / 0.5 s = 10 m * 10 / 5 s ^ 2 = 20 m/s ^ 2 = 20 ms^ -2.

Discussion

49.	word problem by linear equations method : when i was 2 years old my friend age was half of my age .if i am 60 years old then what is the age of my friend?
Answer» My AGE =>2 friend's age =>2/2=1 My friend is 1 year younger than me So if I am 60 My friend's age is 59 YEARS

Discussion

50.	121:12::25:? complete the relation ship given
Answer» PRODUCT of extreme = product of mean LET the fourth no. be x then 121x = 1225 so x = 1225/121 300/121 300/121 is the answer Hope it helps

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If A = {1, 2, 3, 4, 5}, write the relation a R b such that a + b = 8, a ,b € A. Write the domain, range & co-domain.

What is equal to 12 1/2% of 80?

101x 99 using algebraic identity

Simplify by rationalizing the denomiatotor : 1 by 2√7-√5

Arithmetic operators definition

if the straight line x y - x - y + 1 = 0 and the line x + ay - 3 =0 are concurrent then the acute angle between the pair of lines ax2-13xy-7y2+X+23y-6=0 is

This is not a question this is game .you just imagine any number except 0 .you thought okay add it with 5 and again add with 10 and add with 15 okay.now subtract the u thought before and with the answer you get. hmm u got the answer mm it is 30.thx for seeing this cheers

Please help me to solve this...... complete steps...11th standard

Solve these q plz fast I need help

the shadow of a tree is 8m while the Shadow of a stick of length 3m is 2m find the height of the tree

A boat takes 10 hours to travel 30 km upstream and 44 km downstream find speed of stream and speed of boat in still water . find in 2 seconds trick

Ab cut 7.8 cm. n ac cut 4.3 from the bc is

(-10)+3=10-3 is true or false

A body travels along a straight line with speed V¹ for time t¹ and other distance with speed V² for the t² in the same direction. Find the average speed of the body.

√2*√3 what will be the answer of this:-

2+2+46+895679+864+542+89+=

the average temperature of the first three days of a week is 26.5 degree and that next three days is 29 degree celsius.i f the weekly average is 27.4 degree celsius then what's the temperature of the last days

a car travels first half distance with a uniform speed U and next half distance with uniform speed V. Find the average speed?

What will be the result if we do the following - 26-48+(96×73)-72-(952)

This one ch 1 number system Q10

Parts and wholes - fraction

if the price of kerosene is raised by 10%, by how much percent must a person reduce his consumption of kerosene so that his expenditure remains the same.

Write an AP whose first term and common difference are-1,25 and -0,25

The adjacent sides of a parallelogram are 15cm and 8cm. If the distance between the longer sides is 4cm, find the distance between the shorter sides.

A bed sheet was sold for 489 rupees there by gaining 15% find the cost price of bed sheet

Find two irrational number between 1.1 and 1.11

6 minus 4 root 3 upon 6 + 4 root 3

If two zeroes of the polynomialare and find its third zero.want even steps please

10011001 to octal and base 5

Hots question. no:3 solve

Find the average of 11 consecutive odd nos a, b, c,d,e,f,g,hi,j,k. ?

(10011001) to octal and base 5

What is "DE MOIVE'S LAW" ?

in a factory the ratio of salary of skilled and unskilled workers is 5.3 total salary of one day of both them is 720 rupees find daily wages of skilled and unskilled worker

a car moves through 120 km at a speed of 40 km per hour and return back at a speed of 60 km per hour calculate its average speed

the population of a town increases by 10% every year at present the population of the town is 363000 what was the population of the town 2 years back

X equal to zero by equal to minus 12 butter 15 Z equal to 12:35

The condition if two circles of equal radii cut orthoganlly

the cost of 1 metre of cloth is rupees 25 by 1 by 5 what is the cost of 5 by 5.9 metre of cloth? Of fractions lesson is fraction ok I want correct answer ok thanks

Change the sentence from comparitive to Positive- The pen is mightier that the sword.

Expand it (3d - 5 ) (4 - d )

What is the size for leave application form of paper?URGENTpls help

Expand it 10a(2a-b)

ABC is An isosceles triangle, PQR is a equilateral triangle within ABC then find angle 'a'.

Percentage35 ka 25%

Please answer simplify the following

2 racing cars acquire velocities 18kmph and 36kmph in 0.5 sec if they are accelerated uniformly from rest find their accelarations

word problem by linear equations method : when i was 2 years old my friend age was half of my age .if i am 60 years old then what is the age of my friend?

121:12::25:? complete the relation ship given