# NRA CGL (National Recruitment Agency-Combined Graduate Level) Mathematics: Questions 12 - 19 of 425

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## Question number: 12

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MCQ▾

### Question

5 years ago, the ages (in years) of A and B were in the ratio 2: 3; and 5 years hence they will be in the ratio 4: 5. The present age of A is

### Choices

Choice (4)Response

a.

15 years

b.

63 years

c.

26 years

d.

48 years

## Question number: 13

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MCQ▾

### Question

Three spherical balls of radius 3 cm, 4 cm and 5 cm are melted to form a single spherical ball. In the process, the loss of material is 50%. The radius of the new ball is

### Choices

Choice (4)Response

a.

15 cm

b.

10.4 cm

c.

12.1 cm

d.

7 cm

## Question number: 14

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MCQ▾

### Question

Find the missing number for below series

### Choices

Choice (4)Response

a.

48

b.

6

c.

26

d.

176

## Question number: 15

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MCQ▾

### Question

If then the value of will be

### Choices

Choice (4)Response

a.

3

b.

c.

2

d.

## Question number: 16

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MCQ▾

### Question

Find the missing number for below series

### Choices

Choice (4)Response

a.

7

b.

9

c.

10

d.

6

## Question number: 17

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MCQ▾

### Question

If , then the value of is

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 18

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MCQ▾

### Question

Three spherical balls of radius 2 cm, 4 cm and 6 cm are melted to form a single spherical ball. In the process, the loss of material is 25%. The radius of the new ball is

### Choices

Choice (4)Response

a.

6 cm

b.

5 cm

c.

2 cm

d.

3 cm

## Question number: 19

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MCQ▾

is equal to

### Choices

Choice (4)Response

a.

3.8

b.

0.2

c.

1.4

d.

0.14

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