# Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 640 - 646 of 989

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## Question 640

Mathematics
Edit

### Question

MCQ▾

If first and second sides of a right angled triangle are in the ratio 1: 2 and the square of the hypotenuse is 180 cm then the length of first and second side respectively is

### Choices

Choice (4)Response

a.

5,10 cm

b.

6,12 cm

c.

12,6 cm

d.

10,5 cm

## Question 641

Mathematics
Edit

### Question

MCQ▾

The base of an isosceles triangle is 18 cm and its perimeter 48 cm. Then its area is

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 642

Mathematics
Edit

### Question

MCQ▾

In a single throw of two dice, the probability of getting a sum of 3 is

### Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

## Question 643

Mathematics
Edit

### Question

MCQ▾

Find the missing term in the following problem.

### Choices

Choice (4)Response

a.

-42xy

b.

2xy

c.

-2xy

d.

42xy

## Question 644

Mathematics
Edit

MCQ▾

is a

### Choices

Choice (4)Response

a.

Neither positive nor negative rational number

b.

Negative rational number

c.

Either positive or negative rational number

d.

Positive rational number

## Question 645

Mathematics
Edit

### Question

MCQ▾

Name the property of multiplication illustrated by

### Choices

Choice (4)Response

a.

Associative property

b.

Commutative property

c.

Distributive property

d.

All of the above

## Question 646

Mathematics
Edit

### Question

MCQ▾

The smallest positive number from the numbers below is

### Choices

Choice (4)Response

a.

b.

c.

d.