# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad Class 7): Questions 116 - 121 of 122

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## Question number: 116

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The ratio of the number of boys and girls in a college is 4: 3. If the percentage increase in the number of boys and girls be 17 % and 22 % respectively, what will be the new ratio?

### Choices

Choice (4) Response

a.

12: 21

b.

5: 9

c.

21: 22

d.

34: 33

## Question number: 117

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

A boat covers a certain distance downstream in 1 hour, while it comes back in 1 hours. If the speed of the stream be 2 kmph, what is the speed of the boat in still water?

### Choices

Choice (4) Response

a.

11 kmps

b.

15 kmps

c.

5 kmps

d.

8 kmps

## Question number: 118

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

What percent of is ?

### Choices

Choice (4) Response

a.

20%

b.

25%

c.

0.4%

d.

2.5%

## Question number: 119

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The present ages of three persons in proportions 3: 6: 9. Five years ago, the sum of their ages was 57. Find their present ages (in years).

### Choices

Choice (4) Response

a.

12, 24, 36

b.

18, 32, 15

c.

15, 30, 45

d.

All of the above

## Question number: 120

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

A farmer has 2 grasshoppers of the same species. The corresponding parts of the grasshopper’s bodies are proportional. The larger grasshopper has an 8 cm body and a 1.5 cm forelimb. The smaller grasshopper has a 1.2 cm forelimb. How long is the body of the smaller grasshopper?

### Choices

Choice (4) Response

a.

10.0 cm

b.

6.4 cm

c.

6.0 cm

d.

7.7 cm

## Question number: 121

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

A farmer has 2 grasshoppers of the same species. The corresponding parts of the grasshopper’s bodies are proportional. The larger grasshopper has an 15 cm body and a 10 cm forelimb. The smaller grasshopper has a 20 cm forelimb. How long is the body of the smaller grasshopper?

### Choices

Choice (4) Response

a.

40 cm

b.

70 cm

c.

30 cm

d.

50 cm

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