Aptitude · all questions

Ratio
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Q321

In a school,

\frac{5}{12}

of the number of students are girls and the rest are boys.

\frac{4}{7}

of the number of boys are below 14 years of age, and

\frac{2}{5}

of the number of girls are 14 years or above 14 years of age. If the number of students below 14 years of age is 1120, then the total number of students in the school is:

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Q322

How much will be decreased to each terms of ratio 16 : 19, so that it will be 7 : 6?

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Q323

What is the third proportional to 16 and 24?

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Q324

The salaries of Vipin and Dinesh are in the ratio 5 : 8. If the salary of each is increased by 4,800, then new ratio becomes 7 : 10. What is Vipin's salary?

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Q325

The ratio of the length and the perimeter of a rectangle is 2 : 7. What is the ratio of the length and breadth of the rectangle?

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Q326

The ratio of the income of A and B in the last year was 4 : 3. The ratios of their individual incomes in the last year and the present year are 3 : 4 and 5 : 6, respectively. If their total income in the present year in Rs. 24.12 lakhs, then the sum of the income (in Rs. lakh) of A in the last year and that of B in the present year is:

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Q327

A man has in all Rs. 640 in the denominations of one-rupee, five-rupee and ten-rupee notes. The number of each type of notes are equal. What is the total number of notes he has?

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Q328

Rs. 3,600 is divided between Seema, Komal and Rita, such that the ratios of the shares of Seema : Komal = 1.5 : 2 and Komal : Rita = 2 : 2.5. Find Rita's share.

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Q329

In a factory with 400 employees, the ratio of the number of male employees to that of female employees is 5 : 3. There are 87.5% regular employees in the factory. If 92% of male employees are regular employees, then what is the percentage of regular female employees?

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Q330

A bag has Rs. 51.25 in the form of 2-rupee, 50-paise and 25-paise coins in the ratio of 3 : 5 : 7. What is the total number of 50-paise coins?

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Q331

When x is added to each of 9, 15, 21 and 31 the numbers so obtained are in proportion. What is the mean proportional between the numbers (3x - 2) and (5x + 4)?

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Q332

A bag has Rs. 43 in the form of 5 rupee, 50 paise and 10 paise coins in the ratio of 1 : 5 : 11. What is the total number of 50 paise coins?

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