# Mental Ability (NCO- Cyber Olympiad (SOF) Class 9): Questions 179 - 183 of 219

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## Question number: 179

» Mental Ability » Number Games » Number Analogies

Match List-Ⅰ List-Ⅱ▾

### Question

Match the following
 List-Ⅰ List-Ⅱ (A) (i) Natural (B) 1 (ii) Rational (C) (iii) Rational (D) 8 (iv) Natural

### Choices

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

a.

• (ii)
• (iv)
• (i)
• (iii)

b.

• (iv)
• (ii)
• (i)
• (iii)

c.

• (iii)
• (iv)
• (iii)
• (iv)

d.

• (iv)
• (i)
• (iii)
• (ii)

## Question number: 180

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The bacteria in a culture grows by 10 % in the first hour, decreases by 10 % in the second hour and again increases by 10 % in the third hour. If at the end of the third hour the count of bacteria is 30000. The original count of bacteria in the sample is________

### Choices

Choice (4) Response

a.

32870

b.

32670

c.

32970

d.

32770

## Question number: 181

» Mental Ability » Number Games » Number Series

MCQ▾

### Question

Count each 7 which is not immediately preceded by 5 but is immediately followed by either 2 or 3. How many such 7 are there?

5 7 2 6 5 7 3 8 3 7 3 2 2 5 7 2 7 3 4 8 2 6 7 8

### Choices

Choice (4) Response

a.

3

b.

4

c.

5

d.

2

## Question number: 182

» Mental Ability » Basic Algebra

MCQ▾

### Question

A 200-cm piece of wire was cut into equal segments, which were then soldered at the ends to form the edges of a square. What is the Area of the square?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 183

» Mental Ability » Basic Algebra

MCQ▾

### Question

Ms Sunena works at a Electronic shop. Last week she sold 7 more than 4 times the number of TVs that she sold this week. Ms. Sunena sold a total of 100 TVs over the 2 weeks. Which system of equations can be used to find P, the number of TVs she sold last week and Q the number of TVs she sold this week?

### Choices

Choice (4) Response

a.

b.

c.

d.

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