WBCS Math Question set for Arithmetic Practice 5

5th selected WBCS math question set for Arithmetic practice

10 WBCS math questions with answers are on ratio, componendo dividendo, LCM, Simplification, simple geometry, decimals, time work, continued square root. 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.

Or to skip the list and take the test straightaway, click here.

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

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.

Now let us get down to solving the question set with your time watch on.

5th WBCS arithmetic practice question set: time to answer: 10 mins

Problem 1

The product of two numbers is 1575 and their division is $\displaystyle\frac{7}{9}$. The two numbers then are,

1. 45, 35
2. 36, 35
3. 35, 27
4. 81, 63

Problem 2

Two pipes A and B can fill a cistern in 6 minutes and 7 minutes respectively. The two pipes are opened alternately for 1 minute each starting with pipe A. In what time will they fill the cistern?

1. $1\displaystyle\frac{1}{4}$ minutes
2. $6\displaystyle\frac{3}{7}$ minutes
3. $5$ minutes
4. $5\displaystyle\frac{2}{3}$ minutes

Problem 3

Value of $\sqrt{20+\sqrt{20+\sqrt{20+.........}}}$ is,

1. 5
2. 2
3. 3
4. -4

Problem 4

If $a:b=3:4$, then $(7a+3b):(7a-3b)$ is,

1. 5 : 2
2. 4 : 3
3. 11 : 3
4. 37 : 19

Problem 5

The value of $(997)^2+(998)^2+(999)^2 -$

$\hspace{30mm} 997\times{998} - 998\times{999}-999\times{997}$ is,

1. 1
2. 2
3. 3
4. 0

Problem 6

If the sides of a triangle are in the ratio $3:4:5$, the largest angle of the triangle is,

1. $75^0$
2. $90^0$
3. $120^0$
4. $50^0$

Problem 7

The largest possible length that can be used for measuring exactly the three lengths, 7m, 3m 85cm and 12m 95cm is, 

1. 25cm
2. 15cm
3. 42cm
4. 35cm

Problem 8

Area of a square field is 6050 sq m. What is the length of the diagonal?

1. 110m
2. 120m
3. 135m
4. 112m

Problem 9

Value of $0.\overline{3}+0.\overline{4} +0.\overline{7}+0.\overline{8}$ is,

1. $2.4$
2. $2.\overline{4}$
3. $2.44$
4. $2.444$

Problem 10

40 men take 8 days to earn Rs.2000. How many men will earn Rs.200 in 2 days?

1. 16
2. 10
3. 12
4. 1

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Related detailed solution set

Refer to the companion Solution to WBCS Math Question set for Arithmetic Practice 5 for detailed explanation of the concepts and quick methods of solution.

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Answers to the questions

Problem 1. Answer: Option a: 45, 35.

Problem 2. Answer: Option b: $6\displaystyle\frac{3}{7}$ minutes.

Problem 3. Answer: Option a: 5.

Problem 4. Answer: Option c: $11:3$.

Problem 5. Answer: Option c: 3.

Problem 6. Answer: Option b: $90^0$.

Problem 7. Answer: Option: d: 35cm.

Problem 8. Answer: Option a: 110m.

Problem 9. Answer: Option b: $2.\overline{4}$.

Problem 10. Answer: Option: a: 16.

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Question and Solution sets on WBCS Arithmetic

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WBCS Main level Arithmetic Solution set 1

WBCS Main level Arithmetic Question set 1

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