# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad (SOF) Class 9): Questions 41 - 46 of 49

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## Question number: 41

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The sum of two angles of a triangles is 120° and their difference is 20°, find all the angles of the triangle.

### Choices

Choice (4) Response

a.

40°, 50°, 90°

b.

60°, 58°, 70°

c.

50°, 40°, 90°

d.

70°, 50°, 60°

## Question number: 42

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

How many liters of 30 % alcohol solution should be added to 50 liters of a 60 % alcohol solution to make a 40 % solution?

### Choices

Choice (4) Response

a.

100 liters

b.

80 liters

c.

40 liters

d.

60 liters

## Question number: 43

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Out of pair of complementary angles, one is two- third of the other. Find the angles.

### Choices

Choice (4) Response

a.

One Angle = 54°, other Angle = 30°

b.

One Angle = 54°, other Angle = 36°

c.

One Angle = 55°, other Angle = 34°

d.

One Angle = 50°, other Angle = 36°

## Question number: 44

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The sum of two angles of a triangle is 106° and their difference is 10°, find all the angles of the triangle

### Choices

Choice (4) Response

a.

48°, 58°, 74°

b.

50°, 40°, 90°

c.

30°, 60°, 90°

d.

40°, 50°, 90°

## Question number: 45

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Find the measure of all the angles of parallelogram, if one angle is 60 ° less than twice the smallest angle.

### Choices

Choice (4) Response

a.

60°, 120°, 60°, 120°

b.

68°, 112°, 68°, 112°

c.

80°, 100°, 80°, 100°

d.

36°, 144°, 36°, 144°

## Question number: 46

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Find the measure of all the angles of parallelogram, if one angle is 45° less than twice the smallest angle.

### Choices

Choice (4) Response

a.

75°, 105°, 75°, 105°

b.

40°, 140°, 40°, 140°

c.

85°, 95°, 85°, 95°

d.

65°, 115°, 65°, 115°

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