# NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 645 - 652 of 2000

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## Question number: 645

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MCQ▾

### Question

A cylindrical rod whose height is 16 times of its radius is melted and recast into spherical balls of same radius. The number of balls will be

### Choices

Choice (4) Response

a.

6

b.

12

c.

8

d.

4

## Question number: 646

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MCQ▾

### Question

If 3,7, 8 and 4 occur with frequencies 2,6, 7 and 3 respectively, then the arithmetic mean is

### Choices

Choice (4) Response

a.

18

b.

6.44

c.

6.2

d.

8

## Question number: 647

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MCQ▾

### Question

Which of the following statements is true?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 648

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MCQ▾

### Question

In a quadrilateral the sides are 8,15,13,18 units and the angle between first sides is a right angle. The area of quadrilateral is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 649

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MCQ▾

### Question

Centrosome is present in

### Choices

Choice (4) Response

a.

Mitochondria

b.

Cytoplasm

c.

ER

d.

Nucleus

## Question number: 650

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MCQ▾

equals

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 651

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MCQ▾

### Question

A bag contains 6 blue and 9 black balls. If a ball is drawn at random, the probability that the drawn ball to blue is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 652

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MCQ▾

### Question

The value of x from

### Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

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