Constants and Variables

Q.

Natural numbers are also called counting numbers. Say true or false.

1. True

2. False

Q.

The numerical factor of a term is known as variable.

1. True

2. False

Q. Counting numbers 1, 2, 3, 4, ... are called .

1. natural numbers
2. whole numbers
3. integers
4. prime numbers

Q.

The numbers which start from 0 are called _____.

1. Integers

2. Natural numbers

3. Whole numbers

4. Prime numbers

Q. Which of the following is a variable?

1. 7
2. y
3. 6x - 2x - 4x
4. 2

Q.

The first step that we will use to separate variables and constants in the linear equation 2x + 3 = 7 is

1. Multiplying both sides with 3

2. Diving both sides by 2

3. Transposing 7 to LHS

4. Transposing 3 to RHS

Q. Which of the following is a monomial in one variable?

1. 6x+2y-6x-2y
2. 7x
3. $\frac{9x}{x}$
4. 5

Q. Which of the following expression is an algebraic expression in one variable?

1. 7 - 5
2. $6x-2-5x+3-x$
3. $\frac{6x}{3x}$
4. $x$

Q.

The absolute value of a real number is the magnitude of the number without regard to its sign.

1. True

2. False

Q.

Identify the coefficient of x and constant term in the expression $9x+5$.

Q. can be represented as variable.

1. x
2. 5
3. %

Q. 0÷0

Q. Consider the following equations and choose the correct alternative.
2x + y = 5
5b - 2 = 3

1. x and y are variables
2. x and y are unknowns
3. b is an unknown
4. b is a variable

Q. How many constants are there in the expression: $x^{2}y+8$?

1. 1
2. 2
3. 3
4. 0

Q.

It’s Earth 2. Everything here is the same as on our planet Earth, but the only difference is that here, the occupants are numbers form our world. Bill is the only human from Earth 1 to travel to Earth 2. As you progress along the chapter, Bill observes the way the occupants (numbers) of Earth 2 behave and would eventually realize that the laws of numbers hold good everywhere in the universe!

So, Bill enters a room, whose nameplate read, Room N. He notices that, inside the room, the occupants were numbers which he used on a daily basis to count stuff around.

If Bill calls the smallest number among them, which number would turn up?

___

Q. Which among these comes under integers?

1. Positive numbers
2. Whole numbers
3. Negative numbers
4. All of the above.

Q. The variables in the equation x + xy = 15 is/are ______.

1. x and y
2. 15
3. y
4. x

Q.

In the list of counting numbers, 1 is the smallest number. Say true or false.

1. True

2. False

Q.

The numbers -3, 0, 8, are all ______.

1. Whole number

2. Integers

3. Natural numbers

4. Counting numbers

Q. Evaluate:
$8^3\times 8^{-5}\times 8^4$

Q.

The absolute value of a real number is the magnitude of the number without regard to its sign.

1. False

2. True

Q. x and y are the variables in the equation 4x + 7y = 0.

1. False
2. True

Q.

Which of the following represents $4\times \mathrm{x}$ ?

1. $4-\mathrm{x}$

2. $4÷\mathrm{x}$

3. $4+\mathrm{x}$

4. $4\mathrm{x}$

Q. The variables in the equation x + xy = 15 is/are ______.

1. y
2. x and y
3. 15
4. x

Q. x and y are the variables in the equation 4x + 7y = 0.

1. False
2. True

Q.

What are real numbers

Q.

Which of the following statements are true and which are false?

All whole numbers are integers.

1. True
2. False