# Mental Ability (NCO- Cyber Olympiad (SOF) Class 7): Questions 80 - 85 of 205

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## Question number: 80

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Which is greatest in

### Choices

Choice (4) Response

a.

0.15

b.

c.

d.

None of the above

## Question number: 81

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

An ore contain 8 % copper. How many kilograms of the ore are required to get 68 kg of copper?

### Choices

Choice (4) Response

a.

85 kg

b.

850 kg

c.

544 kg

d.

5.44 kg

## Question number: 82

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The cost of cultivating a square field at the rate of rupees 360 per hectare is rupees 3240. What is the cost of putting a fence around it at 75 paise per meter?

### Choices

Choice (4) Response

a.

600 rupees

b.

900 rupees

c.

700 rupees

d.

800 rupees

## Question number: 83

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

If 30 men working 8 hours a day can do a piece of work in 15 days, in how days will 15 men working for 7 hours a day to do the same piece of work?

### Choices

Choice (4) Response

a.

55 days

b.

34.28 days

c.

30 days

d.

12 days

## Question number: 84

» Mental Ability » Number Games

MCQ▾

### Question

The product of two numbers is 25 and the sum of their squares is 125. The sum of the number is.

### Choices

Choice (4) Response

a.

21.21

b.

13.22

c.

16.90

d.

None of the above

## Question number: 85

» Mental Ability » Basic Algebra

MCQ▾

### Question

If and be any two rational numbers then we define:

Thus, subtracting a rational number means adding its additive inverse. Based on the statement given above solve the following Problem: Subtract from.

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page