## 10th selected WBCS math question set for Arithmetic practice

10 WBCS math questions **with answers** are on *number system, hcf lcm, square root, simplification, ratio, fractions, series, compound interest, clock*. 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**

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

#### Problem 1

a, b, c and d are four consecutive odd integers and their average is 42. What is the product of a and c?

- 1845
- 1890
- 1677
- 1860

#### Problem 2

The HCF and LCM of two numbers $x$ and $y$ are respectively 3 and 105. If value of $x+y=36$, then $\displaystyle\frac{1}{x}+\displaystyle\frac{1}{y}$ is,

- $\displaystyle\frac{3}{5}$
- $\displaystyle\frac{4}{35}$
- $\displaystyle\frac{1}{35}$
- $35$

#### Problem 3

A gardener plants 17956 trees in such a way that there are as many rows as there are trees in a row. The number of trees in a row are,

- 144
- 136
- 154
- 134

#### Problem 4

$\displaystyle\frac{(0.73)^3+(0.27)^3}{(0.73)^2+(0.27)^2-(0.73)\times{(0.27)}}$=?.

- $0.73$
- $1$
- $0.4087$
- $0.46$

#### Problem 5

The simplified value of $\displaystyle\frac{1}{1000}\left(\displaystyle\frac{1}{5}+999\displaystyle\frac{494}{495}\times{99}\right)$ is,

- 99
- 99900
- 990
- 9900

#### Problem 6

If $\displaystyle\frac{1}{25}:\displaystyle\frac{1}{x}::\displaystyle\frac{1}{x^2}:\displaystyle\frac{1}{78.125}$, then $x$ is,

- 1.5
- 12.5
- 2
- 3.5

#### Problem 7

The product of two co-primes is 117. Their LCM should be,

- 117
- 1
- equal to their HCF
- cannot be determined

#### Problem 8

Which pair of numbers should come next in the sequence, 9 12 11 14 13 16 15...?

- 18 21
- 18 17
- 17 18
- 14 13

#### Problem 9

The compound interest on Rs. 2000 for two years at 8% per annum is,

- Rs. 228.80
- Rs. 232.80
- Rs. 532.80
- Rs. 332.80

#### Problem 10

Reflex angle between the hands of a clock at 10.25 is,

- $180^0$
- $195^0$
- $192\displaystyle\frac{1}{2}^0$
- $197\displaystyle\frac{1}{2}^0$

To know how to solve the problems quickly in mind and detailed explanation, you should refer to the corresponding solution set, **Solution to 10th WBCS Math Question set for Arithmetic Practice.**

### Answers to the questions

**Problem 1.** Answer. Option c: 1677.

**Problem 2.** Answer: Option b: $\displaystyle\frac{4}{35}$.

**Problem 3.** Answer: Option d: 134.

**Problem 4.** Answer: Option b: $1$.

**Problem 5.** Answer: Option a: 99.

**Problem 6.** Answer: Option b: 12.5.

**Problem 7.** Answer: Option a: 117.

**Problem 8.** Answer: Option b: 18 17.

**Problem 9.** Answer: Option d: Rs. 332.80.

**Problem 10.** Answer: Option d: $197\displaystyle\frac{1}{2}^0$.

### 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**