# Mental Ability-Number Games (NCO- Cyber Olympiad (SOF) Class 8): Questions 1 - 9 of 30

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## Question number: 1

» Mental Ability » Number Games

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MCQ▾

The value of is

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 2

» Mental Ability » Number Games » Number Analogies

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MCQ▾

### Question

The sum of two numbers is 30 and the difference of their squares is 30. The difference of the numbers is

### Choices

Choice (4)Response

a.

1

b.

0

c.

8

d.

3

## Question number: 3

» Mental Ability » Number Games

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MCQ▾

The value of is

### Choices

Choice (4)Response

a.

79

b.

350

c.

343

d.

2401

## Question number: 4

» Mental Ability » Number Games

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MCQ▾

The value of is

### Choices

Choice (4)Response

a.

6

b.

c.

27

d.

3

## Question number: 5

» Mental Ability » Number Games » Number Analogies

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MCQ▾

### Question

What least number must be subtracted from 136 to make it a perfect square?

### Choices

Choice (4)Response

a.

15

b.

8

c.

21

d.

7

## Question number: 6

» Mental Ability » Number Games » Number Analogies

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MCQ▾

### Question

What least number must be added to 219 to make it a perfect square?

### Choices

Choice (4)Response

a.

6

b.

23

c.

19

d.

12

## Question number: 7

» Mental Ability » Number Games » Number Analogies

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MCQ▾

### Question

The sum of two numbers is 45 and the difference of their squares is 45. The difference of the numbers is

### Choices

Choice (4)Response

a.

6

b.

0

c.

9

d.

1

## Question number: 8

» Mental Ability » Number Games

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MCQ▾

### Question

The difference between the compound interest and the simple interest on a certain sum at 20 % per annum for 3 years is Rs. 428.50. Find the sum.

### Choices

Choice (4)Response

a.

Rs.

b.

Rs.

c.

Rs.

d.

836.92 Rs.

## Question number: 9

» Mental Ability » Number Games

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MCQ▾

### Question

The denominator of a rational number is less than its numerator by 2. If 3 is added to the numerator and 2 is subtracted from its denominator, the new number becomes . Find the original number.

### Choices

Choice (4)Response

a.

b.

c.

d.

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