# Mental Ability (NCO- Cyber Olympiad Class 9): Questions 120 - 125 of 219

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## Question number: 120

» Mental Ability » Number Games » Number Analogies

Match List-Ⅰ List-Ⅱ▾

### Question

Match the following
 List-Ⅰ List-Ⅱ (A) Equation (i) Irrational (B) Equation (ii) Irrational (C) Equation (iii) Irrational (D) 0.5555… (iv) Irrational

### Choices

Choice (4) Response
• (A)
• (B)
• (C)
• (D)

a.

• (iii)
• (iv)
• (ii)
• (i)

b.

• (iv)
• (iv)
• (iv)
• (iv)

c.

• (ii)
• (iv)
• (i)
• (iii)

d.

• (iv)
• (ii)
• (i)
• (iii)

## Question number: 121

» Mental Ability » Basic Algebra

MCQ▾

### Question

If is factor of , find the value of q.

### Choices

Choice (4) Response

a.

-30

b.

30

c.

-29

d.

29

## Question number: 122

» Mental Ability » Basic Geometry

MCQ▾

### Question

How many circles of 3 cm radius can be drawn through each of three given 3 points as center of the circle?

### Choices

Choice (4) Response

a.

Infinity

b.

3 only

c.

9 only

d.

All of the above

## Question number: 123

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The bacteria in a culture grows by 20 % in the first hour, decreases by 10 % in the second hour and again increases by 20 % in the third hour. If at the end of the third hour the count of bacteria is 100000. The original count of bacteria in the sample is________

### Choices

Choice (4) Response

a.

129300

b.

129000

c.

129900

d.

129600

## Question number: 124

» Mental Ability » Basic Algebra

MCQ▾

### Question

If is factor of , find the value of a.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 125

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Sterling gold is 92.5 % pure gold. How many grams of sterling gold must be mixed to a 90 % gold alloy to obtain a 500 gm of a 91 % gold alloy?

### Choices

Choice (4) Response

a.

100 gm

b.

50 gm

c.

150 gm

d.

200 gm

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