# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad (SOF) Class 6): Questions 89 - 97 of 268

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## Question number: 89

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

A seller has 15 dresses at the rate of Rs. 450 per dress. If he sold them for Rs. 6400, his loss will be

### Choices

Choice (4) Response

a.

350 Rs.

b.

200 Rs.

c.

300 Rs.

d.

400 Rs.

## Question number: 90

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

when expressed as a percentage of , is ________.

### Choices

Choice (4) Response

a.

9%

b.

27%

c.

36%

d.

25%

## Question number: 91

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The product of two irrational numbers________.

### Choices

Choice (4) Response

a.

Is always rational

b.

Is always irrational

c.

May be rational in some cases and irrational in some other cases

d.

An integer

## Question number: 92

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

when expressed as a percentage of , is ________.

### Choices

Choice (4) Response

a.

85%

b.

87.31%

c.

75%

d.

25%

## Question number: 93

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

By how much must 3 be increased so that it bears same ratio to 10 as 18 to 36?

### Choices

Choice (4) Response

a.

1

b.

4

c.

2

d.

3

## Question number: 94

» Mental Ability » Basic Arithmetic

MCQ▾

### Choices

Choice (4) Response

a.

2.7

b.

270

c.

0.27

d.

27

## Question number: 95

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The subtraction of two irrational numbers________.

### Choices

Choice (4) Response

a.

May be rational in some cases and irrational in some other cases

b.

An integer

c.

Is always irrational

d.

Is always rational

## Question number: 96

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

By how much must 27 be decreased so that it bears same ratio to 49 as 12 to 28?

### Choices

Choice (4) Response

a.

3

b.

2

c.

6

d.

7

## Question number: 97

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

If stands for ‘division’, stands for ‘equal to’, stands for ‘addition’, stands for ‘greater than’, stands for ‘less than’, stands for ‘multiplication’ and stands for ‘subtraction’, then which of the following alternative is correct?

### Choices

Choice (4) Response

a.

b.

c.

d.

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