# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad (SOF) Class 7): Questions 47 - 54 of 122

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## Question number: 47

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

If each side of a cube is doubled, its volume

### Choices

Choice (4) Response

a.

Becomes 6 times

b.

Becomes 8 times

c.

Becomes 4 times

d.

Is doubled

## Question number: 48

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

In an election, two candidates contested. A candidate secured 30 % of the valid votes and is elected by a majority of 150 votes. Find the total number of valid votes.

### Choices

Choice (4) Response

a.

375

b.

570

c.

400

d.

510

## Question number: 49

» Mental Ability » Basic Arithmetic

MCQ▾

Simplify:

### Choices

Choice (4) Response

a.

10

b.

20

c.

11

d.

21

## Question number: 50

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

An ore contain 9 % lead. How many kilograms of the ore are required to get 60 kg of lead?

### Choices

Choice (4) Response

a.

666.66 kg

b.

850.78 kg

c.

544 kg

d.

144.22 kg

## Question number: 51

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Which is greatest in

### Choices

Choice (4) Response

a.

0.15

b.

c.

d.

None of the above

## Question number: 52

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

An ore contain 8 % copper. How many kilograms of the ore are required to get 68 kg of copper?

### Choices

Choice (4) Response

a.

85 kg

b.

850 kg

c.

544 kg

d.

5.44 kg

## Question number: 53

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The cost of cultivating a square field at the rate of rupees 360 per hectare is rupees 3240. What is the cost of putting a fence around it at 75 paise per meter?

### Choices

Choice (4) Response

a.

600 rupees

b.

900 rupees

c.

700 rupees

d.

800 rupees

## Question number: 54

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

If 30 men working 8 hours a day can do a piece of work in 15 days, in how days will 15 men working for 7 hours a day to do the same piece of work?

### Choices

Choice (4) Response

a.

55 days

b.

34.28 days

c.

30 days

d.

12 days

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