4th selected WBCS math question set for Arithmetic practice
10 WBCS math questions with answers are on boats rivers, number system, profit loss, fraction range, ratio, factorization, simplification by basic algebra.
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
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
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 Calendar problems
4th WBCS arithmetic practice question set: time to answer: 10 mins
Problem 1
In a river a man takes 3 hrs in rowing 3kms upstream, but rowing downstream he covers 15kms in same 3 hrs. The speed of the river current is,
- 2km/hr
- 4km/hr
- 9km/hr
- 6km/hr
Problem 2
The product of two successive positive integers is 1980. The smaller of the number is,
- 34
- 44
- 45
- 35
Problem 3
A shop owner gains the selling price of 20 chairs by selling 100 chairs. What is his gain percent?
- 15%
- 12%
- 25%
- 20%
Problem 4
The rational numbers lying between $\displaystyle\frac{1}{4}$ and $\displaystyle\frac{3}{4}$ are,
- $\displaystyle\frac{262}{1000}$, $\displaystyle\frac{752}{1000}$
- $\displaystyle\frac{9}{40}$, $\displaystyle\frac{31}{41}$
- $\displaystyle\frac{13}{50}$, $\displaystyle\frac{264}{350}$
- $\displaystyle\frac{63}{250}$, $\displaystyle\frac{187}{250}$
Problem 5
The ratio of two numbers is 5 : 8 and their difference is 69. The numbers are,
- 69, 128
- 115, 184
- 128, 197
- 43, 112
Problem 6
By what least number must 21600 be multiplied to make it a perfect cube?
- 10
- 30
- 6
- 60
Problem 7
The value of $\left[\left\{\left(-\displaystyle\frac{1}{2}\right)^2\right\}^{-2}\right]^{-1}$ is,
- $\displaystyle\frac{1}{4}$
- $\displaystyle\frac{1}{16}$
- $4$
- $16$
Problem 8
Each side of a rhombus is 5cm. Its area is,
- 23 cm sq
- 24 cm sq
- 25 cm sq
- data insufficient
Problem 9
If $A:B=\displaystyle\frac{1}{6} : \displaystyle\frac{1}{5}$, $B:C=\displaystyle\frac{1}{4} : \displaystyle\frac{1}{3}$, and $C:D=\displaystyle\frac{1}{3} : \displaystyle\frac{1}{5}$, then $A:D$ is,
- $\displaystyle\frac{1}{24} : \displaystyle\frac{1}{25}$
- $\displaystyle\frac{1}{25} : \displaystyle\frac{1}{29}$
- $\displaystyle\frac{1}{24} : \displaystyle\frac{1}{29}$
- $\displaystyle\frac{1}{27} : \displaystyle\frac{1}{25}$
Problem 10
3 men or 5 women can do a work in 12 days. In how many days will 6 men and 5 women will take to complete the work?
- 4 days
- 15 days
- 20 days
- 10 days
Related detailed solution set
Refer to the companion Solution to WBCS Math Question set for Arithmetic Practice 4 for detailed explanation of the concepts and quick methods of solution.
Answers to the questions
Problem 1. Answer: Option a: 2km/hr.
Problem 2. Answer: Option b: 44.
Problem 3. Answer: Option c: 25%.
Problem 4. Answer: Option d: $\displaystyle\frac{63}{250}$, $\displaystyle\frac{187}{250}$.
Problem 5. Answer: Option b: 115, 184.
Problem 6. Answer: Option a: 10.
Problem 7. Answer: Option: b: $\displaystyle\frac{1}{16}$.
Problem 8. Answer: Option d: data insufficient.
Problem 9. Answer: Option a: $\displaystyle\frac{1}{24} : \displaystyle\frac{1}{25}$.
Problem 10. Answer: Option: a: 4 days.
Question and Solution sets on WBCS Arithmetic
10 WBCS Math Questions - 12th Solved Arithmetic Practice Set
Solution to 11th WBCS Math Question set for Arithmetic Practice
11th WBCS Math Question set for Arithmetic Practice
Solution to 10th WBCS Math Question set for Arithmetic Practice
10th WBCS Math Question set for Arithmetic Practice
Solution to 9th WBCS Math Question set for Arithmetic Practice
9th WBCS Math Question set for Arithmetic Practice
Solution to 8th WBCS Math Question set for Arithmetic Practice
8th WBCS Math Question set for Arithmetic Practice
Solution to 7th WBCS Math Question set for Arithmetic Practice
7th WBCS Math Question set for Arithmetic Practice
Solution to 6th WBCS Math Question set for Arithmetic Practice
6th WBCS Math Question set for Arithmetic Practice
Solution to 5th WBCS Math Question set for Arithmetic Practice
5th WBCS Math Question set for Arithmetic Practice
Solution to 4th WBCS Math Question set for Arithmetic Practice
4th WBCS Math Question set for Arithmetic Practice
Solution to 3rd WBCS Math Question set for Arithmetic Practice
3rd WBCS Math Question set for Arithmetic Practice
Solution to 2nd WBCS Math Question set for Arithmetic Practice
2nd WBCS Math Question set for Arithmetic Practice
WBCS Main level Arithmetic Solution set 1
WBCS Main level Arithmetic Question set 1
