# Variables and Expressions

## Trending Questions

**Q.**

How do you find the optimal solution in linear programming** **$?$

**Q.**

Which Is the Right Way To Declare Constant in C?

**Q.**Find a number which when multiplied by 7 and then reduced by 3 equals 53.

**Q.**

A person sells one more than half of the number of the total oranges to the first customer, one more than the one third of remaining oranges to the second customer and one more than one fifth of the remaining oranges to the third customer .at last he finds three oranges are left with him .the total number of oranges he has initially is .........

**Q.**

A statement that is true for all values of its variable is called:

Equation

Symmetric equation

Linear equation

Identity

**Q.**

In the equation x=10y−24, sum of the coefficients of dependent and independent variables is

**Q.**

A number when multiplied by 4 exceeds itself by 36 . Find the number.

**Q.**What is the variable in the expression

4(m−2)+8?

- 4
- -2
- m
- 8

**Q.**

Benny thinks of a number , subtracts 18 from it and divides the difference by 3.The result is -4.What is the number

**Q.**Why we often only use x in term of variable

**Q.**Which of the following is an equation in one variable?

- 2x+3y=0
- x+2y=0
- 2x+3=0
- 5

**Q.**The number that is obtained by adding 2 to 3 is

**Q.**

**Do all functions have limits?**

**Q.**

What rational number should be added -3/16to get 11/24?

**Q.**HOW CAN WE FIND BIRTHDAY DATE WITH SIMPLE ALGEBRA

**Q.**

Solve the following:

(i) Irfan says that he has 7 marbles more than five times the marbles Parmit has. Irfan has 37 marbles. How many marbles does Parmit have?

(ii) Laxmi’s father is 49 year old. He is 4 years older than three times Laxmi’s age. What is Laxmi’s age?

(iii) People of Sundargram planted trees in the village garden. Some of the trees were fruit trees. The number of non-fruit trees was two more than three times the number of fruit trees. What was the number of fruit trees planted if the number of non-fruit trees planted was 77?

**Q.**

The sum of two rational numbers is −43. If one of them is −5, find the other.

**Q.**How many variables does the equation x + y = 5 have?

- 1
- 2
- 3
- 0

**Q.**

Question 1(j)

State whether the given expression is an equation or not.Give reason for your answer.Identify the variable in the given expression.

7=(11×2)+p

**Q.**

find 3 consecutive natural number whose sum is 11

**Q.**I have x oranges. My friend has 3 less than 2 times the number of oranges I have. My friend has

- 3x
- 2x3
- 2x−3
- 3x+2

**Q.**

Question 1(c)

State whether the given statement is an equation or not.Identify the variable in the given expression.

42=2

**Q.**In the term 6x, the variable is ___.

- y
- 6x
- 6
- x

**Q.**

**Q.**

A variable has a fixed value whether this statement is true or false.

- True
- False

**Q.**1) In a fraction, thrice the numerator is 2 more than the denominator. If 3 is added to the numerator and to the denominator, the new fraction becomes 3/5. Find the original fraction. 2) Roshni grandmother is 10 times older than her . She is also 54 years older than Roshni. Find their present age.

**Q.**

**Q.**The denominator of a fraction is greater than the numerator by 8. If we take the numerator as N and the denominator as D, how do we represent the relation between the numerator and the denominator?

- D + N = 8
- N = D + 8
- D = N + 8
- D = 8N

**Q.**The sum of two consecutive even numbers is 86. The larger of the two is

(a) 46

(b) 36

(c) 38

(d) 44

**Q.**What should be added to $\frac{-5}{7}$ to get $\frac{-2}{3}$?