# NCO- Cyber Olympiad Class 6: Questions 238 - 242 of 722

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## Question number: 238

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: 239

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: 240

MCQ▾

### Question

In parallelogram ABCD, E and F are the midpoints of AB and CD respectively. Which of the following is not true?

### Choices

Choice (4) Response

a.

b.

ED is not parallel to BF

c.

AF trisects BD

d.

CE trisects BD

## Question number: 241

MCQ▾

is equal to,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 242

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.

f Page