Maths-

General

Easy

Question

# If LCM of 24 and 42 is 168, find the HCF?

- 6
- 4
- 8
- 10

## The correct answer is: 6

### product of two numbers = LCM *HCF

24 * 42 =168 *HCF

(24 * 42)/168 = HCF

6= HCF

### Related Questions to study

Maths-

### A hollow cuboid is of dimensions 30cm * 27cm * 15cm. How many small cubes with side 3cm can be placed in the given cuboid?

- 340
- 564
- 220
- 450

### A hollow cuboid is of dimensions 30cm * 27cm * 15cm. How many small cubes with side 3cm can be placed in the given cuboid?

Maths-General

- 340
- 564
- 220
- 450

Maths-

### which one is correct according to addition property of equality

- 12-10 =2
- 9 + 2 = 9-2
- 2+3+4 =4+2
- 20+10 =10+20

### which one is correct according to addition property of equality

Maths-General

- 12-10 =2
- 9 + 2 = 9-2
- 2+3+4 =4+2
- 20+10 =10+20

Maths-

### Find the LCM of 12, 16 , 18

- 122
- 123
- 422
- 144

### Find the LCM of 12, 16 , 18

Maths-General

- 122
- 123
- 422
- 144

Maths-

### Find the Third proportion to 12 and 18.

- 25
- 23
- 27
- 29

### Find the Third proportion to 12 and 18.

Maths-General

- 25
- 23
- 27
- 29

Maths-

### The function y= is

- increasing every where
- decreasing every where
- increases for negative 'x' and decreases for positive ‘x’
- increases for positive ‘x' and decreases for negative 'x'

### The function y= is

Maths-General

- increasing every where
- decreasing every where
- increases for negative 'x' and decreases for positive ‘x’
- increases for positive ‘x' and decreases for negative 'x'

Maths-

### If then f(x) is

- decreasing at
- increasing at
- stationary at
- None of these

### If then f(x) is

Maths-General

- decreasing at
- increasing at
- stationary at
- None of these

Maths-

### The interval of increase of the function f(x)=x- + is

- None of these

### The interval of increase of the function f(x)=x- + is

Maths-General

- None of these

Chemistry-

### The probability density plots of 1s and 2s orbitals are given in figure

The density of dots in region represents the probability density of finding electrons in the region. On the basis of above diagram which of the following statements is incorrect?

- The probability of finding the electron at a given distance is equal in all directions
- 1s and 2s orbitals are spherical in shape
- The probability of finding the electron is maximum near the nucleus
- The probability density of electrons for 2s orbitals decreases uniformly as distance from the nucleus increases

### The probability density plots of 1s and 2s orbitals are given in figure

The density of dots in region represents the probability density of finding electrons in the region. On the basis of above diagram which of the following statements is incorrect?

Chemistry-General

- The probability of finding the electron at a given distance is equal in all directions
- 1s and 2s orbitals are spherical in shape
- The probability of finding the electron is maximum near the nucleus
- The probability density of electrons for 2s orbitals decreases uniformly as distance from the nucleus increases

Chemistry-

### Which of the following is an appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene ?

A)

B)

- none of these
- only A
- both A and B
- only B

### Which of the following is an appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene ?

A)

B)

Chemistry-General

- none of these
- only A
- both A and B
- only B

Chemistry-

### The reaction,

is a (an) :

- nucleophilic substitution reaction
- elimination reaction
- electrophilic substitution reaction
- addition reaction

### The reaction,

is a (an) :

Chemistry-General

- nucleophilic substitution reaction
- elimination reaction
- electrophilic substitution reaction
- addition reaction

Chemistry-

### Examine the following two structures for the anilinium ion and choose the correct statement from the ones given below:

- II is not an acceptable canonical structure because the nitrogen has 10 valence electrons
- II is not an acceptable canonical structure because carbocation ions are less stable than ammonium ions
- II is not an accepted canonical structure because it is non-aromatic
- II is an acceptable canonical structure

### Examine the following two structures for the anilinium ion and choose the correct statement from the ones given below:

Chemistry-General

- II is not an acceptable canonical structure because the nitrogen has 10 valence electrons
- II is not an acceptable canonical structure because carbocation ions are less stable than ammonium ions
- II is not an accepted canonical structure because it is non-aromatic
- II is an acceptable canonical structure

Chemistry-

### The final product formed in this reaction is:

### The final product formed in this reaction is:

Chemistry-General

Chemistry-

### The estimation of available chlorine· in bleaching powder is done by:

- Permanganometric titration
- Iodimetries titration
- Acid-base titration
- Iodometric titration

### The estimation of available chlorine· in bleaching powder is done by:

Chemistry-General

- Permanganometric titration
- Iodimetries titration
- Acid-base titration
- Iodometric titration

Chemistry-

### Freundlich adsorption isotherm is given by the expression Then the slope of the line in the following plot is

- x/m
- 1/n
- p

### Freundlich adsorption isotherm is given by the expression Then the slope of the line in the following plot is

Chemistry-General

- x/m
- 1/n
- p

Maths-

### The ascending order of A = , B = , C = is

- A, B, C
- A, C, B
- B, C, A
- B, A, C

### The ascending order of A = , B = , C = is

Maths-General

- A, B, C
- A, C, B
- B, C, A
- B, A, C