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Q:

In a college, number of boys is 75% of number of girls. Difference between boys and girls is 35. On a particular day 20% boys were absent, then find the number of boys those who present?

A) 72	B) 84
C) 93	D) 81

Answer & Explanation Answer: B) 84

Explanation:

Ratio of girls and boys = 100% : 75% = 4:3

Difference is 1 unit = 35

So, 3 units = 35 x 3 = 105

If 20% absent, that’s mean 80% present.

So, present boys = 80% of 105 = $\frac{80 \times 105}{100} = 84$

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Filed Under: Percentage
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Q:

In each question given below four conclusions are followed by statements. You have to take the three given statements to be true (even if they seem to be at variance from the commonly known facts). Read the conclusions and decide which of the following set of statement indicate that conclusion is logically follows.

Statements :
1. All chairs are tents.

2. No chairs is jugs.

3. No jugs is glasses.

4. No glasses is pots.

Conclusions :
I. All pots are tents.

II. All glasses are chair.

III. Some jugs are tents.

A) Only conclusion I follows	B) Both conclusion II & III follows
C) None follows	D) Only conclusion II follows

Answer & Explanation Answer: C) None follows

Explanation:

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Filed Under: Statement and Conclusions
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Q:

The ratio of boys and girls in a school is 9:5.If the total number of students in the school is 1050.Then number of boys is

Answer

Let the ratio be 'R'

Total number of students = 1050

Then,

9R + 5R = 1050

14R = 1050

=> R = 75

Hence, the number of boys = 9R = 9 x 75 = 675

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Subject: Ratios and Proportions Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

Q:

If Average Total Cost is declining then

A) The Marginal Cost is Less than Average Cost	B) The Total Cost must also be Declining
C) The Marginal Cost is Greater than Average Cost	D) The Average Fixed Cost curve must lie above the average variable cost curve

Answer & Explanation Answer: A) The Marginal Cost is Less than Average Cost

Explanation:

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Filed Under: Marketing and Sales

Q:

If radius and height of a cylinder increase by 20% and15% respectively. then what is the % change in curved surface area?

A) 41%	B) 38%
C) 33%	D) 44%

Answer & Explanation Answer: B) 38%

Explanation:

% Change in Curved Surface Area is given by

$% Change in radius + % Change in height + \frac{% Change in radius \times % Change in height}{100}$

$\Rightarrow + 20 + 15 + \frac{20 \times 15}{100} = 38 %$

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Filed Under: Volume and Surface Area
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Q:

A girl read 2/5 part of a book in 1st day, 34% in second day and remaining page in next two days. In two days she read equal number of page. If she read 52 pages on last day, then find out how many pages did the book contain?

A) 400	B) 376
C) 382	D) 356

Answer & Explanation Answer: A) 400

Explanation:

1st day the girl read = 40%

2nd day she read = 34 %

Remaining percentage of book = 100% - (40% +34%) = 26%

But given last two days she read equal number of pages

=> Each day she read 26%/2 = 13%

Last day she read 52 pages = 13%

13% = 52

1% = 4

=> 100% = 400

Total pages in the book is 400.

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Filed Under: Percentage
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Q:

Who invented Bifocal Lens?

A) John Adams	B) Benjamin Franklin
C) James Madison	D) Thomas Jefferson

Answer & Explanation Answer: B) Benjamin Franklin

Explanation:

Benjamin Franklin has long been credited with the invention of bifocal lenses and he was the first to wear bifocal lenses. He did not produce them himself but instead had some optician in London or France make them for him to overcome Presbyopia, a condition that Franklin suffered. He was tired switching between lenses for far and near sightedness. And that resulted in inventing Bifocal Lenses.

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Filed Under: Inventions
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Q:

Cactus Spines are Modified

A) Stems	B) Branches
C) Leaves	D) Roots

Answer & Explanation Answer: C) Leaves

Explanation:

Cactus spines are also known as modified bud scales, which are also called modified leaves.

Cactus spines occur in clusters in the axil of leaves.

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Filed Under: General Awareness
Exam Prep: Bank Exams , AIEEE
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