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In basic maths you are not supposed to get questions from outside ncert books but in standard maths the level of questions is very high and 20% questions are expected to come from outside

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The sum of two numbers is 9 and the sum of their resiprocal is 1/2 . Find the numbers

Posted by Payal Sanjay 5 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Yogita Ingle 5 years, 2 months ago

The sum of two numbers is 9 and the sum of their reciprocal is 1/2.

Let the numbers be x and y respectively.

Sum of numbers is 9.

⇒ x + y = 9.... (i)

⇒ y = 9 - x .... (ii)

Sum of reciprocals is 1/2.

⇒ .... (iii)

Now, on solving (iii),

Putting the value of (i) and (ii) here, we get -

Hence, the required numbers are 6 and 3.

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Mehak Parashar 5 years, 2 months ago

By not going to solve whole we can say that 3+6=9 and by its reciprocal we are getting 1/2

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What is the largest number that divides each one of 1152 and 1664 exactly?

Posted by Anshu Saw 5 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 2 months ago

The largest number that can divide both the numbers will be the HCF of the two numbers -

So prime factors of the numbers –

1152 = 2⁷ × 3²

1664 = 2⁷ × 13.

∴ HCF of number = 2⁷ = 128.

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What is an identity

Posted by Pratiksha Singh 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Shagun Saini 5 years, 2 months ago

in maths , an identity is an relating mathematical expression which proves expression A and expression B equal . With the help of an identity , we can prove A&B expression equal and we can also find values of terms and let's(let x=, lety= etc) in these 2 expressions (expression A and expression B). examples:- (a+b)^2 =a^2+b^2+ 2ab (a+b) (a-b) = a^2-b^2 (a-b)^2= a^2+ b^2 -2ab Hope it's usefull

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If AD=6cm,DB=9cm and AE=8cm find AC.

Posted by Dikshit Dhankhar 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Ruhit Sonar 5 years, 2 months ago

Complete the question..we can't understand the question

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3x8

Posted by Krishna Aggarwal 5 years, 2 months ago

CBSE > Class 10 > Mathematics

4 answers

... Yang ... 5 years, 2 months ago

Twenty-Four(24). HoPe It HeLpS yOu??

0Thank You

Shagun Saini 5 years, 2 months ago

3×8= 24 very difficult ?????

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Saranjeet Kaur Virk 5 years, 2 months ago

3×8=24 Its very simple ?

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Krishna Aggarwal 5 years, 2 months ago

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How many three- digits number are divisible by 3?

Posted by Adinanaik Naik 5 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Divya Verma 5 years, 2 months ago

369

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Sourav Jha 5 years, 2 months ago

300

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Nehal Arora 5 years, 2 months ago

A.P = 102,105,108,..................,999 therefore a=102 d=3 an=999 n? an=a+(n-1)d 999=102+(n-1)3 897=(n-1)3 299= n-1 n= 299+1 n = 300 therefore 300 three digit numbers are divisible by 3.

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Sin18÷Cos72=

Posted by Anirudh Jaat From Haryana 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 2 months ago

sin 18°/cos 72°
= sin (90° - 18°) /cos 72°
= cos 72° /cos 72°

= 1

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Find the area of triangle whose vertices are : (2,3),(-1,0),(2,-4) *

Posted by Hëmäñt Ŕäjwäđë 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Ex 8.2

Posted by Musaib Pir 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If an = 5n+2 then find the first four terms

Posted by Kavya Kavya 5 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Sourav Jha 5 years, 2 months ago

7,12,17 and 22

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Sanika Walimbe 5 years, 2 months ago

7,12,17,22 are the first 4terms

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Kavya Kavya 5 years, 2 months ago

Answer tell me pleas

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Hcf of 276543 and 90628

Posted by Harsh Pahadia 4 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

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If x=asin theta and y=btan theta ,then prove that a^2/x^2- b^2/y^2

Posted by Aparna Salini Shiburaj 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Harsh Pahadia 5 years, 2 months ago

I don't know

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3×2÷8

Posted by Gaurav Sharma 5 years, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

Kajal Rawani 5 years, 2 months ago

3×2÷8 =3×1/4 =3/4 =0.75

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Karan Singh 5 years, 2 months ago

3×2 ÷8 = 3 × 0.25 = 0.75

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Yogita Ingle 5 years, 2 months ago

3 × 2 ÷ 8

= 3 × 0.25

= 0.75

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Aparna Salini Shiburaj 5 years, 2 months ago

3 × 2 ÷ 8 =6÷8 =0.75

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ಹರ್ಷನಂದ ಹರ್ಷನಂದ 5 years, 2 months ago

0.75

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6-3

Posted by Roshan Kumar Ray 5 years, 2 months ago

CBSE > Class 10 > Mathematics

4 answers

... Yang ... 5 years, 2 months ago

Three(3). HoPe It HeLpS yOu??

0Thank You

Kajal Rawani 5 years, 2 months ago

0Thank You

ಹರ್ಷನಂದ ಹರ್ಷನಂದ 5 years, 2 months ago

1Thank You

Roshan Kumar Ray 5 years, 2 months ago

0Thank You

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sec theta+tan theta/sec theta-tan theta =(1+sin theta/cos theta)^2

Posted by Vartika Pandey 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

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+91 90488 80890

Posted by Jessal Kurian 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

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If cosec theta= 5 by 4 find cot theta

Posted by Tanvi Gaur 5 years, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

Shubham Saxena ???? 5 years, 2 months ago

5/4

1Thank You

Harsh Pahadia 5 years, 2 months ago

I don't know tanvi

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Utsav Raj 5 years, 2 months ago

3/4

2Thank You

Mannan Agarwal 5 years, 2 months ago

3/4

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Supriya Rout 5 years, 2 months ago

3/4

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Some basic knowledge about polynomial

Posted by Yuvraj Kuntal Jaat 5 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Utsav Raj 5 years, 2 months ago

Polynomial is algebraic expression with non negative integral power

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Mannan Agarwal 5 years, 2 months ago

In polynomials variable should be whole number. Variable should not be in fraction , not in root and variable should not be negative.it should always be a positive number.

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Yuvraj Kuntal Jaat 5 years, 2 months ago

I want to know about polynomials

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A train travels a distance of 480km at a uniform speed. If the speed had been 8 km/hr less

Posted by Anjali Kasar 5 years, 2 months ago

CBSE > Class 10 > Mathematics