CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

Ask questions which are clear, concise and easy to understand.

Ask Question

how many three of digit natural numbers are divisible by 7

Posted by Krishnpal Yadav 5 years ago

2 answers

105, 112, 119, ..., 994 This is an AP with first term (a) = 105 and common difference (d) = 7 Let an be the last term. an = a + (n - 1)d 994 = 105 + (n - 1)(7) 7(n - 1) = 889 n - 1 = 127 n = 128 Thus, there are 128 three-digit natural numbers that are divisible by

1Thank You

Yogita Ingle 5 years ago

Three digit numbers divisible by 7 are

<div>

105, 112, 119, ..., 994

This is an AP with first term (a) = 105 and common difference (d) = 7

Let an be the last term.

an = a + (n - 1)d

994 = 105 + (n - 1)(7)

7(n - 1) = 889

n - 1 = 127

n = 128

Thus, there are 128 three-digit natural numbers that are divisible by 7.

</div>

0Thank You

ANSWER

The length of a tangent from a point A at distance 5cm from the centre of the circle is 4 cm. Find the radius of the circle.

Posted by Vartika Pandey 5 years ago

CBSE > Class 10 > Mathematics

3 answers

Gautam Sinha 5 years ago

25²= 4²+ OB² slove karo

0Thank You

Gautam Sinha 5 years ago

Ans =3cm

0Thank You

Vartika Pandey 5 years ago

Please give me the answer

0Thank You

ANSWER

what is the hcf of 29700 and 30240

Posted by Vedant Ahuja 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years ago

Factors the number,

LCM is the least common multiple,

Therefore, LCM of 30240 and 29700 using prime factorisation method is 1663200.

0Thank You

ANSWER

Find the ratio in which P(4,m) divides the line segment joining the points A(2,3) and B(6,-3). Hence find m.

Posted by Akash Adhikary 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years ago

Let
P(4, m) = (x, y)
A(2, 3) = (x1, y1)
B(6, -3) = (x2, y2)
By using section formula in this points, we get.
Let the ratio in which P divide the line segment A and B be = k:1
Therefore,
x = kx₂ + x₁(1)/k + 1
=> 4 = 6k + 2 /k + 1
=> 4k + 4 = 6k + 2
=> 2k = 2
=.> k = 1
So, the ratio = 1:1
Now,
y = k(y₂) + 1(y₁) / k + 1
=> m = -3 + 3 /1 + 1
=> m = 0/2
=> m = 0.

0Thank You

ANSWER

from a point Q,the length of the tangent to a circle is 24 cm, the distance of Q from the centre is 25 cm. the radius of the circle is

Posted by Meghana Narisetty 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Gautam Sinha 5 years ago

25²= 24²+OB slove karo

0Thank You

ANSWER

Please please please answer it Class 10 maths ex 12.2 q4

Posted by Shital Kafley 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

What is the formula used to find the zeros or roots of a quadratic polynomial

Posted by Akash K 5 years ago

CBSE > Class 10 > Mathematics

2 answers

King Adithya H M... 5 years ago

*Given a function of the form f(x)=ax2+bx+c, one can find the zeroes of the function (that is, where f(x)=0) by using the quadratic formula: x=−b±√b2−4ac2a. If the discriminant b2−4ac is less than zero, these roots will be complex or imaginary, and if the discriminant is greater than or equal to 0. these roots will be real. The use of ± informs us that there are two solutions here; one where we are subtracting √b2−4ac, and one where we are adding it.* For a step by step example, assume the function f(x)=x2−7x+10. Here a=1,b=−7,c=10. If we set f(x)=0, then the values of x for which f(x)=0, that is to say the roots of f(x), would be determined by the quadratic formula: x=−(−7)±√(−7)2−4(1)(10)2(1)=7±√49−402=7±√92=7±32. Thus, our roots will be at x=7+32 and x=7−32 or x=5 and x=2. On the graph of the function, we would see that the parabola crosses the x-axis at x=2 and x=5.

4Thank You

Kanishka Singh 5 years ago

First split the middle term and get factors of the given polynomial. Next to it put the factors equal to the value of zero. Then you will get the zeroes of the polynomial. You can also verify your answer using verification method.

1Thank You

ANSWER

If the mode and mean are 28 and 27 then respectively find the median

Posted by Ishika Tanwar 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years ago

Mode= 3 Median - 2 mean

=> 28 = 3 median - 2*27

=> 16= 3 median - 54

=> 3 median= 70

=> median= 70/3= 23.33

so, Median of distribution is 23.33

0Thank You

ANSWER

in figure abcd is a trapezium in which ab parallel ef parallel dc. the length of ae

Posted by D Devika 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

What is the symbol used to denote irrational numbers

Posted by Akash K 5 years ago

CBSE > Class 10 > Mathematics

3 answers

Anand Nishad 5 years ago

Hello

1Thank You

Itachi Uchiha ? 5 years ago

The symbol used to denote irrational number is Q

4Thank You

Itachi Uchiha ? 5 years ago

Hii Sandhya..........

3Thank You

ANSWER

mm high passes vertically above another plane at an instant when the angle of elevation of two aeroplane from the same point on the ground are 60 degree and 45 degree respectively find the vertical distance between the two plane

Posted by Komal Rathour 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Maths ma unit 6 of class 10 ma exersice 6.3 board ma ayagee

Posted by Sahil ??? Paliwal 5 years ago

CBSE > Class 10 > Mathematics

5 answers

Igl Praveen 5 years ago

0Thank You

Parth Kabra 5 years ago

Nahi

0Thank You

Jagrati Sharma?? 5 years ago

Yes...

0Thank You

Mamta ... 5 years ago

hanji ayegee

0Thank You

Sumesh ☺️☺️☺️ 5 years ago

Yes

0Thank You

ANSWER

Write the place of 7and 8 in 67,85,325. Also,find the difference of both place value.

Posted by Bimla Dahiya 5 years ago

CBSE > Class 10 > Mathematics

2 answers

King Adithya H M... 5 years ago

The place of 7 is 1,00,000 I.e., 6@,85,325 & place of 8 is 10,000 I.e., 67,@5,325. The difference is: 1,00,000-10,000=90,000.

0Thank You

Paru ? 5 years ago

The place of 7 is 1,00,000 I.e., 6@,85,325 & place of 8 is 10,000 I.e., 67,@5,325. The difference is: 1,00,000-10,000=90,000. Hope this is your answer ?.

1Thank You

ANSWER

Ans.Given:Alinesegmentoflength7.6cm. Toconstruct:Todivideitintheratio5:8andtomeasurethetwoparts. Stepsofconstruction: (a)FromapointA,drawanyrayAX,makinganacuteanglewithAB. (b)Locate13(=5+8)pointson AXsuchthat (c)Join. (d)Throughthepoint,drawalineparalleltointersectingABatthepointC. Then,AC:CB=5:8 Onmeasurementweget,AC=3.1cmandCB=4.5cm

Posted by Rishabh Pawar 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Jagrati Sharma?? 5 years ago

You are right paru...

1Thank You

Paru ? 5 years ago

Hey Rishabh Type your answer in answer option. Don't type it in question option. If you don't know where to type your answer then see, first you have to press 'answer' option (you will get it below in every questions). Then you will get 'type your answer' option (that too you will get below). Then type your answer & send it. Hope you got it ?.

1Thank You

ANSWER

Solution : Given a triangle ABC, we are required to construct another triangle whosesides are 34 of the corresponding sides of the triangle ABC.Steps of Construction :1.Draw any ray BX making an acute anglewith BC on the side opposite to the vertexA.2.Locate 4 (the greater of 3 and 4 in 34)points B1, B2, B3 and B4 on BX so thatBB1 = B1B2 = B2B3 = B3B4.3.Join B4C and draw a line through B3 (the3rd point, 3 being smaller of 3 and 4 in34) parallel to B4C to intersect BC at C¢.4.Draw a line through C¢ parallelto the line CA to intersect BA at A¢(see Fig. 11.3).Then, D A¢BC¢ is the required triangle.Let us now see how this construction gives the required triangle.By Construction 11.1, BC3CC1¢=×¢Therefore, BCBC+CCCC1411BCBCBC33¢¢¢==+=+=¢¢¢, i.e.,BCBC¢ = 34.Also C¢A¢ is parallel to CA. Therefore, D A¢BC¢ ~ D ABC.(Why ?)So,ABACBC3ABACBC4¢¢¢¢===×

Posted by Rishabh Pawar 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Solution : We havex2 + 7x + 10 = (x + 2)(x + 5)So, the value of x2 + 7x + 10 is zero when x + 2 = 0 or x + 5 = 0, i.e., when x = – 2 orx = –5. Therefore, the zeroes of x2 + 7x + 10 are – 2 and – 5. Now,sum of zeroes =2(7)–(Coefficientof),–2(–5)–(7)1Coefficientofxx-+===product of zeroes =210Constantterm(2)(5)101Coefficientofx

Posted by Rishabh Pawar 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

(x+a)(x+b)=?

Posted by Rishabh Pawar 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Nishant Bhati 5 years ago

X²+(a+b)-2ab

0Thank You

Paru ? 5 years ago

(X+a)(X+b)=X^2+(a+b)X+(ab)

1Thank You

ANSWER

A brooch is made with silver in the form of circle with dia

Posted by Ranjeet Kumar 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

8*14/7*2)/(18/6*3)

Posted by Tuba Tahseen 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Sumant Kumar 5 years ago

8×14/7×2)/(18/6×3)=8×2×2)/(3×3)=32/9=14/3

5Thank You

ANSWER

2tan30/1-tan²30

Posted by Vinod Sah 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Gautam Sinha 5 years ago

2×1/√3/1-(1/√3) ² solve krna ok

0Thank You

Gautam Sinha 5 years ago

Ans √3

0Thank You

ANSWER

please guys help me in my revision of ch 8 and 10 of maths

Posted by Shubham Rai 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Itachi Uchiha ? 5 years ago

If u have already completed ur NCERT BOOK...and u want revise any chapter then firstly solve all the example, exercise questions , and solve sample paper, previous year paper of that chapter after this I hope u are ready for testing these chapter.....

2Thank You

ANSWER

anyone is here who can revise me ch 8 and 10 of maths?

Posted by Shubham Rai 5 years ago

CBSE > Class 10 > Mathematics

2 answers

Aditya Raj 5 years ago

Yes I am revise

1Thank You

Mr;:; Sonu Kumar 5 years ago

yes i

1Thank You

ANSWER

Exercise 4.1 question 2

Posted by Divya Divya 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Divya Divya 5 years ago

Exercise 4.1 question 4

7Thank You

ANSWER

What number should be added to -4/7 to get 5/9?

Posted by Mikail Shaikh 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Xyz Student 5 years ago

Solution: Let number be added is x -4/7 + x = 5/9 x= 5/9 + 4/7 = (35+36) upon 63 i.e. = 35+36/63 =71/63 Hence, required number is 71/63

0Thank You

ANSWER

Guys what does statement and simple problems on division algorithm for polynomials with real coefficient mean Pls amswer

Posted by Aaron E 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

https://t.me/Biology

Posted by Dinesh Singh 5 years ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

How many chapters of yours are left to complete guys??? Mine: Che - 1 ch remaining? Maths-8 ch remaining? Computer- I have not even touched the book. ??

Posted by Akhya Sahay 5 years ago

CBSE > Class 10 > Mathematics

3 answers

Aaron E 5 years ago

Don't worry you can start from next year ?

4Thank You

Sahil Kumar 5 years ago

Abhi tak Sanskrit Aur english kee second book bhi nhi dekhi ,

2Thank You

Itachi Uchiha ? 5 years ago

Mene to abhi start hi ni kiya??????

1Thank You

ANSWER

A man walks a certain distance with certain speed. If he walks 1/2 km an hour faster, he takes 1 hour less. But, if he walks 1 km an hour slower, he takes 3 more hours. Find the distance covered by the man and his original rate of walking.

Posted by Ysys Gssgg 5 years ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 5 years ago

Let the original speed y km/ hr and total time taken be x h

Distance = xy

[ Distance = time × speed]

(y + ½) (x - 1) = xy

xy - y + x/2 - ½ = xy

x/2 - y = ½ ………………(1)

[Distance covered in each case is same]

(y -1) (x + 3) = xy

xy + 3y -x -3 = xy

-x + 3y = 3……………..(2)

Multiply equation 1 by 3 ,

3x/2 - 3y = 3/2…………(3)

On adding eq 2 and 3,

-x + 3y = 3

3x/2 - 3y = 3/2

---------------------

-x +3x/2 = 3/2 +3

(-2x + 3x)/2 = (3+6)/2

x/2 = 9/2

x = 9

On Putting x = 9 in eq 2

-x + 3y = 3

-9 + 3y = 3

3y = 3 +9

3y = 12

y = 12/3

y = 4

Distance covered by man = xy = 9 × 4 = 36 km

Original speed of walking = y = 4 km/h

Hence, the Distance covered by man is 36 km & Original speed of walking is 4 km/h.

0Thank You

ANSWER

Mai abhi 2+2=5 hota h prove kr deti hu .......bcz mujhe us time koi argent kaam h let's starting..

Posted by Itachi Uchiha ? 5 years ago

CBSE > Class 10 > Mathematics

5 answers

Itachi Uchiha ? 5 years ago

No I waste my time to this question from 2 days .. ????

2Thank You

Itachi Uchiha ? 5 years ago

??✌️????✌️?????????

1Thank You

Itachi Uchiha ? 5 years ago

Btaiye ki kahan rule break hua h or mera tarika pasand aaya ho to thnks ka button jaroor press Krna....

1Thank You

Ayush Kumar 5 years ago

I know how you solved it, you have solved it by mistake

1Thank You

Itachi Uchiha ? 5 years ago

0=0 (as we all know).. If write it as 20-20 =25-25 (I didn't see any problem in this statement) Then, If we write 20-20 as (4×5)-(4×5) there is no problem.... similarly we write 25-25 as (5×5)-(5×5). ....then if we take 4 in L.H.S as a common digit. And take 5-5 in bracket..... similarly we take 5 in R.H.S as a common digit...and take 5-5 in bracket.... And in both the sides L.H.S AND R.H.S. we have to see that (5-5) in common then we cut it .. Now we have to see 4=5and we also write it as 2+2=5. ?????????????????? MENE KR DIYA JAISA MENE KAHA THA KI MENE RULE TODA H MATHS KA TO PLZZ BTAYIA KO MENE RULE KAHAM TODA H IS PURE QUESTION MEI ...??☺️?? ???????MENE KR DIYA ????

4Thank You

ANSWER

Express sec theta in terms of cos theta

Posted by Suhani Sanjay 5 years ago

CBSE > Class 10 > Mathematics