# Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 839 - 845 of 989

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## Question 839

Mathematics
Edit

### Question

MCQ▾

The mean of 551,553,555,557,559 and 561 is

### Choices

Choice (4)Response

a.

553

b.

561

c.

559

d.

556

## Question 840

Mathematics
Edit

### Question

MCQ▾

The sum of the deviations of the variable values 5,9, 10,12,14 from 10 is

### Choices

Choice (4)Response

a.

10

b.

1

c.

0

d.

All of the above

## Question 841

Mathematics
Edit

### Question

MCQ▾

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

### Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

## Question 842

Mathematics
Edit

### Question

MCQ▾

The mean of 20 numbers is 40. If 2 is added to each of the first ten numbers, then the mean of the new set of 20 numbers is

### Choices

Choice (4)Response

a.

41

b.

35.5

c.

21

d.

20.5

## Question 843

Mathematics
Edit

### Question

MCQ▾

The length of the hypotenuse of a right angled triangle whose two sides measure 8 cm and 0.15 m is

### Choices

Choice (4)Response

a.

8.15 cm

b.

0.23 cm

c.

17 cm

d.

15 cm

## Question 844

Mathematics
Edit

### Question

MCQ▾

An isosceles triangle can be obtuse angled.

### Choices

Choice (4)Response

a.

True

b.

Cannot be determined

c.

False

d.

None of the above

## Question 845

Edit

### Question

MCQ▾

A hemispherical bowl is made of steel of 0.2 cm thickness. The inner radius of the bowl is 15 cm. The volume of steel used is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.