# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad (SOF) Class 9): Questions 47 - 49 of 49

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## Question number: 47

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Find the measure of all the angles of parallelogram, if one angle is 24° less than twice the smallest angle.

### Choices

Choice (4) Response

a.

60°, 120°, 60°, 120°

b.

66°, 114°, 66°, 114°

c.

68°, 112°, 68°, 112°

d.

56°, 124°, 56°, 124°

## Question number: 48

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

Given, , and find the value of the following expression correct up to three places of decimal: .

### Choices

Choice (4) Response

a.

-0.413

b.

0.213

c.

-0.213

d.

0.413

## Question number: 49

» 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

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