# NSTSE (National Science Talent Search Exam- Unified Council) Class 7: Questions 868 - 873 of 1732

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## Question number: 868

Edit
MCQ▾

### Question

The mean of 8 observations is 34. If one observation, namely 13 is deleted, the new mean is

### Choices

Choice (4)Response

a.

42

b.

35

c.

58

d.

37

## Question number: 869

Edit
MCQ▾

### Question

The microorganisms of water can be killed by which process so that it is safe for drinking purpose?

### Choices

Choice (4)Response

a.

By excessive cooling

b.

By putting medicines

c.

By boiling water

d.

All of the above

## Question number: 870

Edit
MCQ▾

### Question

The daily sale of water (in liters) in a shop for six days is as follows:

15,20,22,36,50 and 25

The average daily sale is

### Choices

Choice (4)Response

a.

47

b.

22

c.

32

d.

28

## Question number: 871

Edit
MCQ▾

### Question

Why wooden handles are used in cooking utensils?

### Choices

Choice (4)Response

a.

Wooden handles are cheap

b.

Wooden handles does not break easily

c.

Wooden handles look pretty and attractive.

d.

None of the above

## Question number: 872

Edit
MCQ▾

### Question

The average weight of sample of 12 apples is 60 g. Later it was found that the weighing machine had shown the weight of each apple 10 g less. The correct average weight of an apple is

### Choices

Choice (4)Response

a.

70 g

b.

60 g

c.

55 g

d.

50 g

## Question number: 873

Edit
MCQ▾

### Question

The length and breadth of a rectangular hall are 0.8 m and 60 cm respectively. The distance between two opposite corners of the hall is

### Choices

Choice (4)Response

a.

14.85 cm

b.

100 m

c.

14.85 m

d.

100 cm

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