# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad (SOF) Class 9): Questions 29 - 34 of 49

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 520 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 350.00 or

## Question number: 29

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Question when simplified is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 30

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

In three colored boxes-pink, cyan and yellow 240 balls are placed. There are thrice as many balls in the cyan, pink boxes combined as there are in the yellow box, and twice as many in the yellow as there are in the pink box. How many balls are there in the yellow box?

### Choices

Choice (4) Response

a.

36

b.

50

c.

60

d.

30

## Question number: 31

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Divide 116 among four parts such that 5 added to first part, 4 subtracted from second part, third multiplied by 3 and the fourth divided by2 are all equal.

### Choices

Choice (4) Response

a.

24,36,72,90

b.

22,31,9, 54

c.

15,30,45,60

d.

32,21,9, 60

## Question number: 32

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The sum of two angles of a triangles is 80° and their difference is 10°, find all the angles of the triangle.

### Choices

Choice (4) Response

a.

25°, 35°, 110°

b.

60°, 58°, 70°

c.

45°, 45°, 90°

d.

45°, 35°, 100°

## Question number: 33

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

How much pure alcohol should be added to 400ml of a 15 % solution to make its strength 32%?

### Choices

Choice (4) Response

a.

100 ml

b.

95 ml

c.

90 ml

d.

80 ml

## Question number: 34

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Given, , and find the value of the following expression correct up to three places of decimal: .

### Choices

Choice (4) Response

a.

3.78

b.

3.88

c.

-2.88

d.

-2.67

f Page