# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad Class 7): Questions 65 - 71 of 122

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## Question number: 65

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Which of the following can be the exact multiple of 2?

### Choices

Choice (4) Response

a.

27

b.

15

c.

63

d.

12

## Question number: 66

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The cost of cultivating a square field at the rate of rupees 250 per hectare is rupees 3650. What is the cost of putting a fence around it at 25 paise per meter?

### Choices

Choice (4) Response

a.

425.6 rupees

b.

200 rupees

c.

382.09 rupees

d.

320 rupees

## Question number: 67

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Human blood RBC’s are expressed in terms of number of red blood cells per cubic mm. Express 8.8 million blood cells per cubic mm terms of scientific notation.

### Choices

Choice (4) Response

a.

8.8

b.

88

c.

0.88

d.

0.88

## Question number: 68

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Which of the following can be the exact multiple of 3?

### Choices

Choice (4) Response

a.

28

b.

17

c.

63

d.

13

## Question number: 69

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Find the value of from the equation

### Choices

Choice (4) Response

a.

15.5

b.

12

c.

13.3

d.

14

## Question number: 70

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

A shopkeeper declares a sale of computer books, giving 25 % discount. If the net sale price of a book is rupees 714, what is its market price?

### Choices

Choice (4) Response

a.

500 Rs

b.

550 Rs

c.

952 Rs

d.

1008 Rs

## Question number: 71

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The present ages of three persons in proportions 3: 6: 9. Eight years ago, the sum of their ages was 66. Find their present ages (in years).

### Choices

Choice (4) Response

a.

16, 28, 26

b.

8, 20, 28

c.

15, 30, 45

d.

None of the above

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