# Real Numbers Free Doubts and Solutions

### CBSE - IX - Mathematics - Number System

## 1)State whether the following statements are true or false. Give reasons for your answer. (a)Every rational number is a whole number

**sanjanashrivastav.25**18th May 2019, 4:05 PM

### CBSE - IX - Mathematics - Number System

## Are fractions real numbers

**swatiwhaval**8th May 2019, 12:56 PM

### CBSE - IX - Mathematics - Number System

## 1. What is a nonzero? 2. What is a nonzero even numbers? 3. what is a nonzero multiple of 3?

**gspublicschool**9th October 2018, 7:11 AM

### CBSE - IX - Mathematics - Number System

##
A circular field has a circumference of 360 km. Three cyclist starttogether and can cycle 48 60 and 72 km a day round the field. when will they meet again?

A circular field has a circumference of 360 km. Three cyclist starttogether and can cycle 48 60 and 72 km a day round the field. when will they meet again?

**Nilesh Raikar**20th July 2017, 4:13 PM

### CBSE - IX - Mathematics - Number System

## Q) The value of is
A) 3
B) 6
C)
D)

**banerjee_milky**23rd June 2017, 2:29 PM

### CBSE - IX - Mathematics - Number System

## I wanted to know why the rationalising factor of the equation is , instead of . This equation was in one of the video lessons, and I am a bit confused why addition is being used in the rationalising factor. Can I use as the rationalising factor?

**shikharmota**11th April 2017, 4:34 PM

### CBSE - IX - Mathematics - Number System

## You know that 1/7 = I.142857 bar. Can you predict what the decimal expansions of 2/7, 3/7, 4/7, 5/7, 6/7 are, without actually doing the long division? If so, HOWAND WHY?

**Shashi Bushan**10th March 2017, 6:58 PM

### CBSE - IX - Mathematics - Number System

## can you please tell me how we get** (3+3)(3-3)= 9-3=6** using the given identity??
**(a+b)(a-b)=a^2-b**

*using the given identity??*

**(3+3)(3-3)= 9-3=6**

**(a+b)(a-b)=a^2-b****syamjulie**2nd May 2016, 6:55 PM

### CBSE - IX - Mathematics - Number System

## What decimal of an hour is a second?

**tv2000in**29th April 2016, 11:39 PM

### CBSE - IX - Mathematics - Number System

## how to convert a recurring rational number in the form of p/q. plz write its steps with an example.

**eeshan.nk**23rd March 2016, 1:49 PM

### CBSE - IX - Mathematics - Number System

## Select three distinct digits. Form a three digit number. Form the other number by reversing the digits. Find the difference of these two numbers. What is the GCD of all such differences? Please give step-by-step detailed answer.

**Divyaa**12th December 2015, 9:31 PM

### CBSE - IX - Mathematics - Number System

## represent 2-root 3 on number line

**nisha_vini29**28th April 2015, 9:17 AM

### CBSE - IX - Mathematics - Number System

## Q. The question is of book R.D.SHARMA...............................
Exercise 2.1 question is the first question of question number 3....

**Shreshth Sahu**11th January 2015, 9:19 PM

### CBSE - IX - Mathematics - Number System

##
###

Simplified value of is:

Simplified value of is:

**kanishkapanwar2424**24th August 2014, 12:40 PM

### CBSE - IX - Mathematics - Number System

## 1. If 2power x+5 X 3 power 2x-9 =3022 find value of x ?
2. x= 3+23+2 and y= 3-23+2 find x2 + y2-xy

**vaibhavmishratempleton**3rd July 2014, 10:06 PM

### CBSE - IX - Mathematics - Number System

## Simplify:

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## If x = 3 + then

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Simplify:

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## If x = find the value of x2 + xy + y2.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## If x = 3+2, check whether is rational or irrational.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## If , find the value of .

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Simplify the following by rationalizing the denominators:

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Simplify the following by rationalizing the denominator.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Simplify : .

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Simplify the following by rationalizing the denominators.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Express with rational denominator.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Simplify the following into a fraction with rational denominator.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Express with rational denominator.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Find the value of a and b if = a - b.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Simplify the following:

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Simplify:

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## If x = 5 - 2 then find the value of x2 + .

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## If x = and y = then find the value of x + y.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Simplify :

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Express in the form of where p and q are integers and q 0.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## Evaluate : , given that = 3.162.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

## If both a and b are rational numbers, find a and b for the following:

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Number System

##
If x = √3+1/2, then the value of 4x^{3}+ 2x^{2} – 8x + 7 will be what?

(a)10

(b)8

(c)6

(d)4

If x = √3+1/2, then the value of 4x^{3}+ 2x^{2} – 8x + 7 will be what?

(a)10

(b)8

(c)6

(d)4

**Archeet**2nd June 2014, 8:35 PM

### CBSE - IX - Mathematics - Number System

## If x = √3+1 /2, then the value of x^{2} + 1/x^{2} and x^{2} – 1/x^{2}

^{2}+ 1/x

^{2}and x

^{2}– 1/x

^{2}

**Archeet**2nd June 2014, 9:59 AM

### CBSE - IX - Mathematics - Number System

##
Q.Prove that: √((3×5^(-3) ) )÷?(3^(-1) ) √5 ×√(6&3×5^6 ) =3/5

**Shreshth Sahu**24th May 2014, 7:53 AM

### CBSE - IX - Mathematics - Number System

##
Q.1.**If 2**^{m+n }divided by 2^{n-m }= 16 and a = 2^{1/10 }, then a^{2m+n-p }divided by (a^{m-2n+2p })^{-1} =

** **

Q.1.**If 2 ^{m+n }divided by 2^{n-m }= 16 and a = 2^{1/10 }, then a^{2m+n-p }divided by (a^{m-2n+2p })^{-1} =**

** **

**Shreshth Sahu**23rd May 2014, 7:48 PM

### CBSE - IX - Mathematics - Number System

## what is the actual meaning of real numbers? how do they differ from whole numbers and rational numbers? please explain.

**Arkajyoti Banerjee**19th May 2014, 11:39 PM

### CBSE - IX - Mathematics - Number System

## Simplify the following by rationalizing the denominator. .

**Topperlearning User**10th February 2014, 9:39 AM

### CBSE - IX - Mathematics - Number System

## what is real no.

**Topper Demo**6th April 2011, 1:10 PM