# Mental Ability (NCO- Cyber Olympiad (SOF) Class 7): Questions 142 - 149 of 205

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## Question number: 142

» 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: 143

» 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: 144

» 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: 145

» 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: 146

» 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: 147

» 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: 148

» 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: 149

» Mental Ability » Basic Statistics

Match List-Ⅰ List-Ⅱ▾

### Question

Match the reciprocal of each of the following in exponential form:
 List-Ⅰ List-Ⅱ (A) (i) (B) (ii) (C) (iii) (D) (iv)

### Choices

Choice (4) Response
• (A)
• (B)
• (C)
• (D)

a.

• (ii)
• (iv)
• (iii)
• (i)

b.

• (iii)
• (iv)
• (ii)
• (i)

c.

• (ii)
• (iii)
• (iv)
• (i)

d.

• (i)
• (iii)
• (iv)
• (ii)

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