# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad (SOF) Class 6): Questions 1 - 8 of 268

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## Question number: 1

» Mental Ability » Basic Arithmetic

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MCQ▾

### Question

What is the least common factor (LCM) of 8 and 10?

### Choices

Choice (4) Response

a.

40

b.

80

c.

16

d.

24

## Question number: 2

» Mental Ability » Basic Arithmetic

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MCQ▾

### Question

What is the least common factor (LCM) of 14 and 21?

### Choices

Choice (4) Response

a.

42

b.

21

c.

70

d.

45

## Question number: 3

» Mental Ability » Basic Arithmetic

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MCQ▾

### Question

What is the least common factor (LCM) of 45 and 35?

### Choices

Choice (4) Response

a.

90

b.

45

c.

54

d.

30

## Question number: 4

» Mental Ability » Basic Arithmetic

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MCQ▾

### Question

John charged Rs. 15.75 for each birdhouse he built. If the material costs Rs. 10.25 Per house, how much profit could he earn after selling five houses?

### Choices

Choice (4) Response

a.

Rs. 78.75

b.

Rs. 27.50

c.

Rs. 25.50

d.

Rs. 51.25

## Question number: 5

» Mental Ability » Basic Arithmetic

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MCQ▾

### Question

The number that should replace the triangle so that the following forms a proportion is________.

12,21,8, ∆

### Choices

Choice (4) Response

a.

18

b.

16

c.

14

d.

20

## Question number: 6

» Mental Ability » Basic Arithmetic

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MCQ▾

### Question

A number is divisible by 5 if, ________.

### Choices

Choice (4) Response

a.

The last digit is 5 or 0

b.

The sum of the digits is divisible by 5

c.

The sum of the digits is divisible by 10

d.

Question does not provide sufficient data or is vague

## Question number: 7

» Mental Ability » Basic Arithmetic

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MCQ▾

### Question

11111 - 1111 + 111 - 11 + 1 is ________.

### Choices

Choice (4) Response

a.

102

b.

10101

c.

12345

d.

9901

## Question number: 8

» Mental Ability » Basic Arithmetic

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MCQ▾

### Question

Which will be the digit in THOUSAND’S place in this given operation?

### Choices

Choice (4) Response

a.

4

b.

3

c.

8

d.

7

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