# NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 870 - 878 of 1484

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## Question number: 870

Edit
MCQ▾

### Question

The value of ………. .

### Choices

Choice (4)Response

a.

0

b.

1

c.

-1

d.

All of the above

## Question number: 871

Edit
MCQ▾

### Question

When two dice are thrown, the probability of getting a number always greater than 3 on the first dice is

### Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

## Question number: 872

Edit
MCQ▾

### Question

A person walking 45 m towards a chimney in a horizontal line through its base observes that its angle of elevation changes from to . The height of chimney is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

## Question number: 873

Edit
MCQ▾

### Question

If and are the roots of the equation when , then the roots of the equation are:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 874

Edit
MCQ▾

### Question

The value of = ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 875

Edit
MCQ▾

### Question

The value of = ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 876

Edit
MCQ▾

### Question

If be the roots of the quadratic equation , then the quadratic equation whose roots are and is:

### Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

## Question number: 877

Edit
MCQ▾

### Question

The value of k if are collinear is

### Choices

Choice (4)Response

a.

3

b.

0

c.

-1

d.

-3

## Question number: 878

Edit
MCQ▾

### Question

The point lies on

### Choices

Choice (4)Response

a.

-ve Y-axis

b.

+ve X-axis

c.

+ve Y-axis

d.

-ve X-axis

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