# NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 623 - 630 of 1484

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## Question number: 623

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MCQ▾

### Question

If then the value of x in terms of a and b is

### Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

## Question number: 624

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MCQ▾

### Question

Area of triangle enclosed between the coordinate axes with vertices and is ________.

### Choices

Choice (4) Response

a.

10 sq units

b.

15 sq units

c.

-5 sq units

d.

5 sq units

## Question number: 625

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MCQ▾

The roots of are

### Choices

Choice (4) Response

a.

-5 and 3

b.

-3 and -5

c.

3 only

d.

-5 only

## Question number: 626

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MCQ▾

### Question

If ‘a’ and ‘b’ are unequal and and have a common factor, then = ________.

### Choices

Choice (4) Response

a.

1

b.

2

c.

- 1

d.

0

## Question number: 627

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MCQ▾

### Question

The coordinates of the center of a circle passing through and is ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 628

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MCQ▾

### Question

The coordinates of the center of a circle passing through and is ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 629

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MCQ▾

### Question

If a coin is tossed twice, the probability of getting at least one head is

### Choices

Choice (4) Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

## Question number: 630

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MCQ▾

### Question

In , then x = ________.

### Choices

Choice (4) Response

a.

9

b.

12

c.

6

d.

81

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