# NCO- Cyber Olympiad (SOF) Class 6: Questions 24 - 30 of 722

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## Question number: 24

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MCQ▾

### Question

Which of the following is a secondary memory device?

### Choices

Choice (4)Response

a.

Keyboard

b.

ALU

c.

Hard drives

d.

None of the above

## Question number: 25

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MCQ▾

### Question

What must be added to to make it ?

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 26

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MCQ▾

### Question

L. C. M. of 81 and 54 is ________.

### Choices

Choice (4)Response

a.

162

b.

27

c.

81

d.

54

## Question number: 27

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MCQ▾

### Question

Find the prime number from given numbers.

### Choices

Choice (4)Response

a.

27

b.

39

c.

69

d.

23

## Question number: 28

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MCQ▾

### Question

A basket contains 300 mangoes. 75 mangos were distributed among students. The percentage of mangoes left in the basket is ________.

### Choices

Choice (4)Response

a.

75%

b.

25%

c.

30%

d.

50%

## Question number: 29

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MCQ▾

### Question

If the sum of black dots on the opposite faces of a dice is always 7, then which one of the following figure is correct?

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 30

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MCQ▾

### Question

Six opened faces of a cube show some filled shapes. Find the correct figure Of cube after it closed.

### Choices

Choice (4)Response

a.

b.

c.

d.

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