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
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
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,
- 60%
- 20%
- 100%
- 120%
Problem 2
When 40% of a number is added to 42, the result is the number itself. The number is,
- 72
- 70
- 82
- 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?
- 10 sec
- 20 sec
- 12 sec
- 15 sec
Problem 4
If $a:b=c:d=e:f=1:2$, then $(3a+5c+7e):(3b+5d+7f)=\text{?}$.
- $1:2$
- $2:1$
- $1:4$
- $8:7$
Problem 5
The speed of a train 150m long is 50km/h. How much time will it take to pass a platform 600m long?
- 64 sec
- 60 sec
- 50 sec
- 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?
- 3
- 5
- 7
- 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,
- $770$
- $1155$
- $385\times{385}$
- $1540$
Problem 8
If $1.5x=0.04y$, then the value of $\left(\displaystyle\frac{y-x}{y+x}\right)$ is,
- $\displaystyle\frac{73}{77}$
- $\displaystyle\frac{703}{77}$
- $\displaystyle\frac{73}{770}$
- $\displaystyle\frac{730}{77}$
Problem 9
The population of a town increases annually by 5% . If it is 15435 now, the population two years ago was,
- 13700
- 14000
- 15000
- 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,
- 6m
- 5m
- 5.4m
- 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.
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.
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