# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad (SOF) Class 7): Questions 93 - 100 of 122

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## Question number: 93

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

If 12 men working 5 hours a day can do a piece of work in 5 days; in how days will 10 men working for 3 hours a day to do the same piece of work?

### Choices

Choice (4) Response

a.

11.66 days

b.

30 days

c.

10 days

d.

55 days

## Question number: 94

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

If , find the value of x.

### Choices

Choice (4) Response

a.

62

b.

68

c.

58

d.

26

## Question number: 95

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Human blood RBC’s are expressed in terms of number of red blood cells per cubic mm. Express 5.5 million blood cells per cubic mm terms of scientific notation.

### Choices

Choice (4) Response

a.

55

b.

5.5

c.

5.5

d.

0.55

## Question number: 96

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

A train 500 meters long is running at a speed of 48 . If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is.

### Choices

Choice (4) Response

a.

130

b.

500

c.

300

d.

100

## Question number: 97

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Find the value of from the equation

### Choices

Choice (4) Response

a.

62

b.

35

c.

45

d.

33

## Question number: 98

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

A man sold a radio for 1220 and gained 20%, then the radio was bought for?

### Choices

Choice (4) Response

a.

1016.66

b.

1200

c.

980

d.

1790

## Question number: 99

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Two cubes have volumes in the ratio 1: 125. Then the ratio of their sides is

### Choices

Choice (4) Response

a.

1: 18

b.

1: 2

c.

1: 5

d.

1: 8

## Question number: 100

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The present ages of three persons in proportions 2: 3: 4. Five years ago, the sum of their ages was 48. Find their present ages (in years).

### Choices

Choice (4) Response

a.

16, 28, 26

b.

8, 20, 28

c.

14, 21, 28

d.

None of the above

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