# NCO- Cyber Olympiad (SOF) Class 7: Questions 247 - 252 of 417

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## Question number: 247

Edit
MCQ▾

### Question

A boat covers a certain distance downstream in 2 hour, while it comes back in 1 hours. If the speed of the stream be 5 kmph, what is the speed of the boat in still water?

### Choices

Choice (4)Response

a.

25 kmps

b.

11 kmps

c.

12 kmps

d.

35 kmps

## Question number: 248

Edit
MCQ▾

### Question

In the series 11,13,15,17, ________, 19 what will be the missing term?

### Choices

Choice (4)Response

a.

18

b.

22

c.

16

d.

20

## Question number: 249

Edit
MCQ▾

### Question

Step 1:

Step 2:

Step 3:

Are the above given steps a simplification of algebraic expression

### Choices

Choice (4)Response

a.

Only step 1 is correct

b.

Yes

c.

Only step 1 and 2 are correct

d.

No

## Question number: 250

Edit
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)1

### Choices

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

a.

• (iii)
• (iv)
• (i)
• (ii)

b.

• (iii)
• (ii)
• (iv)
• (i)

c.

• (iii)
• (iv)
• (ii)
• (i)

d.

• (i)
• (iv)
• (iii)
• (ii)

## Question number: 251

Edit
MCQ▾

### Question

Which number should come in place of question mark (? )?

### Choices

Choice (4)Response

a.

120

b.

30

c.

80

d.

20

## Question number: 252

Edit
MCQ▾

### Question

If D is the brother of B, how B is related to C? To answer this question which of the statements is/are necessary?

1. The son of D is the grandson of C.

2. B is the sister of D.

### Choices

Choice (4)Response

a.

Either 1 or 2

b.

Only 1

c.

1 and 2 are required

d.

Only 2

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