Maths-

General

Easy

Question

# In a packet of 40 pens, 12 are red. So, what % age are red pens?

- 33%
- 27%
- 30%
- 21%

## The correct answer is: 30%

### Given:- Total no. of pens =40.

Number of a red pens =12

% age of red pens = ×100

### Related Questions to study

Chemistry-

### Consider the following compounds, which of these will release CO_{2} with 5% NaHCO_{3} ?

i)

ii)

iii)

- (i) and (ii)
- (i) and (iii)
- (i),(ii) and (iii)
- (ii) and (iii)

### Consider the following compounds, which of these will release CO_{2} with 5% NaHCO_{3} ?

i)

ii)

iii)

Chemistry-General

- (i) and (ii)
- (i) and (iii)
- (i),(ii) and (iii)
- (ii) and (iii)

Chemistry-

### Identify the product' Y' in the following reaction sequence:

- cyclobutane
- cyclopentane
- pentane
- cyclopentanone

### Identify the product' Y' in the following reaction sequence:

Chemistry-General

- cyclobutane
- cyclopentane
- pentane
- cyclopentanone

Chemistry-

### In homogeneous catalytic reactions, there are three alternative paths A,B and C (shown in the figure) which one of the following indicates the relative ease with which the reaction can take place?

### In homogeneous catalytic reactions, there are three alternative paths A,B and C (shown in the figure) which one of the following indicates the relative ease with which the reaction can take place?

Chemistry-General

Chemistry-

### In a spontaneous adsorption process

- ΔH is positive
- ΔH is zero
- all the above
- ΔH is sufficiently negative

### In a spontaneous adsorption process

Chemistry-General

- ΔH is positive
- ΔH is zero
- all the above
- ΔH is sufficiently negative

Chemistry-

### Graph between log and log P is a straight line at angle 0 45 with intercept OA as shown Hence , at a pressure of 2 atm is

- 2
- 1
- 8
- 4

### Graph between log and log P is a straight line at angle 0 45 with intercept OA as shown Hence , at a pressure of 2 atm is

Chemistry-General

- 2
- 1
- 8
- 4

Maths-

### If and then

### If and then

Maths-General

Maths-

### Assertion : For the volume of the parallel piped formed by vectors and is maximum (The vectors form a right-handed system)

Reason: The volume of the parallel piped having three coterminous edges and

- Statement is true, statement is true; statement is a correct explanation for statement
- Statement is true, statement is true statement is not a correct explanation for statement
- Statement is true, statement is false
- statement is false, statement is true

### Assertion : For the volume of the parallel piped formed by vectors and is maximum (The vectors form a right-handed system)

Reason: The volume of the parallel piped having three coterminous edges and

Maths-General

- Statement is true, statement is true; statement is a correct explanation for statement
- Statement is true, statement is true statement is not a correct explanation for statement
- Statement is true, statement is false
- statement is false, statement is true

Maths-

### Assertion (A): Let . If such that is collinear with and is perpendicular to is possible, then .

Reason (R): If and are non-zero, non-collinear vectors, then can be expressed as where is collinear with and is perpendicular to

- statement is false, statement is true
- Statement is true, statement - 2 is true; statement is a correct explanation for statement
- Statement is true, statement is true statement is not a correct explanation for statement
- Statement - 1 is true, statement is false

### Assertion (A): Let . If such that is collinear with and is perpendicular to is possible, then .

Reason (R): If and are non-zero, non-collinear vectors, then can be expressed as where is collinear with and is perpendicular to

Maths-General

- statement is false, statement is true
- Statement is true, statement - 2 is true; statement is a correct explanation for statement
- Statement is true, statement is true statement is not a correct explanation for statement
- Statement - 1 is true, statement is false

Maths-

### Statement If are distinct non-negative numbers and the vectors â and are coplanar then is arithmetic mean of and .

Statement -2: Parallel vectors have proportional direction ratios.

- Statement is True, Statement is True; Statement is a correct explanation for Statement - 1
- Statement is False, Statement is True
- Statement is True, Statement is False
- Statement is True, Statement is True; Statement is NOT a correct explanation for Statement - 1

### Statement If are distinct non-negative numbers and the vectors â and are coplanar then is arithmetic mean of and .

Statement -2: Parallel vectors have proportional direction ratios.

Maths-General

- Statement is True, Statement is True; Statement is a correct explanation for Statement - 1
- Statement is False, Statement is True
- Statement is True, Statement is False
- Statement is True, Statement is True; Statement is NOT a correct explanation for Statement - 1

Maths-

### If and is a vector satisfying .

Assertion can be expressed in terms of and .

Reason

- Statement is true, statement - 2 is true statement - 2 is not a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
- statement - 1 is false, statement - 2 is true
- Statement - 1 is true, statement - 2 is true; statement - 2 is a correct explanation for statement

### If and is a vector satisfying .

Assertion can be expressed in terms of and .

Reason

Maths-General

- Statement is true, statement - 2 is true statement - 2 is not a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
- statement - 1 is false, statement - 2 is true
- Statement - 1 is true, statement - 2 is true; statement - 2 is a correct explanation for statement

Maths-

### If are non-zero vectors such that then

Assertion : Least value of is

Reason (R): The expression is least when magnitude of is

- statement - 1 is false, statement - 2 is true
- Statement is true, statement - 2 is true statement - 2 is not a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
- Statement - 1 is true, statement - 2 is true; statement - 2 is a correct explanation for statement

### If are non-zero vectors such that then

Assertion : Least value of is

Reason (R): The expression is least when magnitude of is

Maths-General

- statement - 1 is false, statement - 2 is true
- Statement is true, statement - 2 is true statement - 2 is not a correct explanation for statement
- Statement - 1 is true, statement - 2 is false
- Statement - 1 is true, statement - 2 is true; statement - 2 is a correct explanation for statement

Maths-

### Statement- 1: If and and , then there exist real numbers , such that

Statement- 2: are four vectors in a 3 - dimensional space. If are non-coplanar, then there exist real numbers such that

- Both are true is reason for
- Both are false
- Both are true & but is not reason for .
- is true, is false

### Statement- 1: If and and , then there exist real numbers , such that

Statement- 2: are four vectors in a 3 - dimensional space. If are non-coplanar, then there exist real numbers such that

Maths-General

- Both are true is reason for
- Both are false
- Both are true & but is not reason for .
- is true, is false

Maths-

### Statement- :If are non-collinear points. Then every point in the plane of , can be expressed in the form

Statement- :The condition for coplanarity of four points is that there exists scalars not all zeros such that where .

- Both are true but is not reason for .
- Both are true & is reason for .
- Both are false
- is true, is false

### Statement- :If are non-collinear points. Then every point in the plane of , can be expressed in the form

Statement- :The condition for coplanarity of four points is that there exists scalars not all zeros such that where .

Maths-General

- Both are true but is not reason for .
- Both are true & is reason for .
- Both are false
- is true, is false

Maths-

### Assertion (A): The number of vectors of unit length and perpendicular to both the vectors. and is zero Reason

(R): and are two non-zero and non-parallel vectors it is true that is perpendicular to the plane containing and

- statement - 1 is false, statement - 2 is true
- Statement is true, statement is true statement is not a correct explanation for statement
- Statement is true, statement - 2 is true; statement is a correct explanation for statement
- Statement - 1 is true, statement - 2 is false

### Assertion (A): The number of vectors of unit length and perpendicular to both the vectors. and is zero Reason

(R): and are two non-zero and non-parallel vectors it is true that is perpendicular to the plane containing and

Maths-General

- statement - 1 is false, statement - 2 is true
- Statement is true, statement is true statement is not a correct explanation for statement
- Statement is true, statement - 2 is true; statement is a correct explanation for statement
- Statement - 1 is true, statement - 2 is false

Maths-

### The value of for which the straight lines and are coplanar is

- -1
- 1
- 2

### The value of for which the straight lines and are coplanar is

Maths-General

- -1
- 1
- 2