WBCS Math Question set for Arithmetic Practice 7

7th selected WBCS math question set for Arithmetic practice

10 WBCS math questions with answers are on time distance, race, number system, ratio, train running, time work, compound growth, componendo dividendo. It should be useful for prelims of other competitive exams also.

The solution set (linked at the end) explains how to solve the questions quickly in mind.

To refresh concepts on any topic and to know how to solve the questions quickly, refer to the concept articles listed below.

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Concept tutorials and articles on Arithmetic

Number system, fractions and surds

Numbers, Number system and basic arithmetic operations

Factorization or finding out factors

HCF and LCM

Fractions and decimals, basic concepts part 1

How to solve surds part 1 rationalization

How to solve surds part 2 double square root surds and surd term factoring

How to find perfect square root of integers or decimals

Ratio and proportion and mixing liquids

Ratio and proportion

Arithmetic problems on mixing liquids and based ages

How to solve arithmetic mixture problems in a few steps 1

How to solve arithmetic mixture problems in a few steps 2

Percentage

Basic and rich percentage concepts

Componendo dividendo

Componendo dividendo explained

Simple interest and compound interest

Basic and rich concepts on simple interest and compound interest

Work time, work wages and pipes and cisterns

How to solve arithmetic problems on work time, work wages and pipes and cisterns

How to solve time work problems in simpler steps type 1

How to solve time work problems in simpler steps type 2

Speed time distance, train problems and boats in rivers

Basic concepts on speed time distance, train running and boats and rivers

How to solve time distance problems in a few simple steps 1

How to solve time distance problems in a few simple steps 2

Profit and loss

How to solve in a few steps profit and loss problems 1

How to solve similar problems in a few seconds profit and loss problems 2

How to solve difficult profit and loss problems in a few steps 3

How to solve difficult profit and loss problems in a few steps 4

Clocks and Calendars

How to solve Clock problems

How to solve Calendar problems

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7th WBCS arithmetic practice question set: time to answer: 10 mins

Problem 1

A man gains 10% by selling an article at a certain price. If he sells it at double the price, the profit made is,

1. 60%
2. 20%
3. 100%
4. 120%

Problem 2

When 40% of a number is added to 42, the result is the number itself. The number is,

1. 72
2. 70
3. 82
4. 105

Problem 3

If $\displaystyle\frac{4}{5}$th of a cistern is filled in 1 minute, how much more time will be required to fill the rest of it?

1. 10 sec
2. 20 sec
3. 12 sec
4. 15 sec

Problem 4

If $a:b=c:d=e:f=1:2$, then $(3a+5c+7e):(3b+5d+7f)=\text{?}$.

1. $1:2$
2. $2:1$
3. $1:4$
4. $8:7$

Problem 5

The speed of a train 150m long is 50km/h. How much time will it take to pass a platform 600m long?

1. 64 sec
2. 60 sec
3. 50 sec
4. 54 sec

Problem 6

A can do a work in 20 days and B can do it in 12 days. B worked at it for 9 days. In how many days can A alone finish the remaining work?

1. 3
2. 5
3. 7
4. 11

Problem 7

If $(1^2 + 2^2 + 3^2+.....+10^2)=385$, then the value of $(2^2+4^2+6^2+.....+20^2)$ is,

1. $770$
2. $1155$
3. $385\times{385}$
4. $1540$

Problem 8

If $1.5x=0.04y$, then the value of $\left(\displaystyle\frac{y-x}{y+x}\right)$ is,

1. $\displaystyle\frac{73}{77}$
2. $\displaystyle\frac{703}{77}$
3. $\displaystyle\frac{73}{770}$
4. $\displaystyle\frac{730}{77}$

Problem 9

The population of a town increases annually by 5% . If it is 15435 now, the population two years ago was,

1. 13700
2. 14000
3. 15000
4. 14800

Problem 10

In a 100m race, A beats B by 10m and C by 13m. In a race of 180m between the three, B will beat C by,

1. 6m
2. 5m
3. 5.4m
4. 4.5m

To know how to solve the problems quickly in mind and detailed explanation, you should refer to the corresponding solution set, Solution to 7th WBCS Math Question set for Arithmetic Practice.

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Answers to the questions

Problem 1. Answer: Option d: 120%.

Problem 2. Answer: Option b: 70.

Problem 3. Answer: Option d: 15 secs.

Problem 4. Answer: Option a: $1:2$.

Problem 5. Answer: Option d: 54 secs.

Problem 6. Answer: Option b: 5 days.

Problem 7. Answer: Option d: 1540.

Problem 8. Answer: Option a: $\displaystyle\frac{73}{77}$.

Problem 9. Answer: Option b: 14000.

Problem 10. Answer: Option c: 5.4m.

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Question and Solution sets on WBCS Arithmetic

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11th WBCS Math Question set for Arithmetic Practice

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WBCS Main level Arithmetic Solution set 1

WBCS Main level Arithmetic Question set 1

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