# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad Class 6): Questions 59 - 64 of 268

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## Question number: 59

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Hiral think of a number then she subtract 5 from it and multiply the answer by 4. Let the resulting number be X. Starting with X, how can she get the original number back?

### Choices

Choice (4) Response

a.

Multiply X by 5 and then subtract 4 from the result

b.

Divide X by 4 and then add 5 to the result

c.

Divide X by 4 and then subtract 5 from the result

d.

Multiply X by 4 and then add 5 to the result

## Question number: 60

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

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

23, 56, 42, ∆

### Choices

Choice (4) Response

a.

105

b.

100

c.

102

d.

104

## Question number: 61

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

is equivalent to ________.

### Choices

Choice (4) Response

a.

50%

b.

30%

c.

25%

d.

75%

## Question number: 62

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

I think of a number, add 10 to it and divide the answer by 2. Let the resulting number be X. Starting with X, how can I get my original number back?

### Choices

Choice (4) Response

a.

Add 2 to X and then divide the resulting number by 10

b.

Multiply X by 2 and then add 10 to the result

c.

Divide X by 2 and then add 10 to the result

d.

Multiply X by 2 and then subtract 10 from the result

## Question number: 63

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

How many numbers from 45 to 86 divisible by 9?

### Choices

Choice (4) Response

a.

5

b.

3

c.

4

d.

7

## Question number: 64

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

If all the numbers from 12 to 110 which are divisible by 12 are arranged in descending order then which number will be at 8 th place?

### Choices

Choice (4) Response

a.

84

b.

24

c.

12

d.

96

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