# NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 660 - 666 of 1484

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## Question number: 660

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MCQ▾

### Question

Two numbers are chosen from 2 to 8. The probability for the two numbers to be consecutive is

### Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

## Question number: 661

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MCQ▾

### Question

If and are the roots of the quadratic equation with the condition , then the value of ‘m’ is

### Choices

Choice (4) Response

a.

- 9

b.

2

c.

9

d.

9 or -9

## Question number: 662

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MCQ▾

### Question

A card is drawn from a packet of 150 cards numbered 1 to 150. The probability of drawing a number which is a square is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 663

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MCQ▾

### Question

The value of = ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 664

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MCQ▾

### Question

A person walking 30 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: 665

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MCQ▾

### Question

The probability for a randomly selected number out of 51,52,53,54, …. , 80 to be a prime number is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 666

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MCQ▾

### Question

From a normal pack of cards, a card is drawn at random. The probability of getting a jack or a king is

### Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

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