# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad (SOF) Class 6): Questions 74 - 81 of 268

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## Question number: 74

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The LCM of two numbers is 504. Which of the following numbers cannot be possibly the HCF of these numbers?

### Choices

Choice (4) Response

a.

18

b.

42

c.

16

d.

36

## Question number: 75

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The product of two numbers is 4000. If the H. C. F. of the numbers is 20, then L. C. M. will be ________.

### Choices

Choice (4) Response

a.

20

b.

200

c.

10

d.

40

## Question number: 76

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

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

16, 24, 26, ∆

### Choices

Choice (4) Response

a.

39

b.

37

c.

36

d.

40

## Question number: 77

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

L. C. M. of 52 and 104 is ________.

### Choices

Choice (4) Response

a.

52

b.

78

c.

104

d.

39

## Question number: 78

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Saint Mary’s School’s students are going on a trip. Group 1 will have 23 passengers on the bus, while Group 2 will have 19 passengers and Group 3 will have 21 passengers on the bus. How many passengers will be on the bus from Saint Mary’s School?

### Choices

Choice (4) Response

a.

135

b.

72

c.

89

d.

63

## Question number: 79

» Mental Ability » Basic Arithmetic

MCQ▾

### Choices

Choice (4) Response

a.

1

b.

cannot be determined

c.

0

d.

-1

## Question number: 80

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

If the selling price of 5 books is same as the cost price of 6 books then gain percent is……….

### Choices

Choice (4) Response

a.

19%

b.

20%

c.

15%

d.

5%

## Question number: 81

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Which set of data given below not show a constant rate of change?

### Choices

Choice (4) Response

a.

 Authors No. of Books 1 2 3 6 12 18

b.

 Total Animals Zoo 25 50 100 1 2 4

c.

 Family Members 1 st 3 rd 9 th 4 8 12

d.

 Subjects Standard 5 6 7 3 5 7

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