# Online Examination

## UPSC/PSC/BANK/RAILWAY,etc. examination questions

Questions about Mathematics including Kerala Administrative Service (KAS), Secretariat Assistant, Panchayath Secretary, BDO, Auditor, Assistant, LDC and LGS examination level questions. You need a lot of experience in taking an online exam.

#### 1.

#### What are natural numbers

*Ans:-1,2,3,4.........etc*

#### 2.

#### The lowest natuaral number is

*Ans:-One*

#### 3.

#### What are whole numbers

*Ans:-Natural numbers including zero*

#### 4.

#### The lowest whole number is

*Ans:-zero*

#### 5.

#### The lowest even numbers

*Ans:-Two*

#### 6.

#### The lowest prime number

*Ans:-Two*

#### 7.

#### The additive inverse of x+1 is

*Ans:-x-1*

#### 8.

#### Which is known as the additive identity of addition

*Ans:-Zero*

#### 9.

#### Which is known as multiplicative inverse of multiplication

*Ans:-One*

#### 10.

#### 1.5 x 1.5= ----------

*Ans:-2.25*

#### 11.

#### .15 x .15=--------

*Ans:-.0225*

#### 12.

#### How many prime numbers are there before 50

*Ans:- 15*

*Ans:-(2,3,5,7,11,13,17,19,23,29,31,37,41,43,47)*

#### 13.

#### The sum of the prime numbers between 30 and 50

*Ans:-199*

*Ans:-(31+37+41+43+47)*

#### 14.

#### (-28) - (-28) = -----------

*Ans:--28+28= 0*

#### 15.

#### If 149 x m = 12367, what is the value of m

*Ans:-12367/149 = 83*

#### 16.

#### The differecne betewween the place value and the face value of 3 in the number 2435 is _____

*Ans: 27*

Face value of a digit in a number is the digit itself, whatever place it occupies

ie. face value of 5 is 5, face value of 3 is 3 , face value of 2 is 2

Place value of a digit in a number = face value X value of the place it occupies

ie. place value of 5 is 1, place value of 3 is 10, place value of 4 is 100, place value of 2 is 1000

Calculation

face value of 3 = 3

place value of 3 =30

differecne=30-3 =27

#### 17.

#### The place value of 8 in 15,051 is __________

*Ans: 10,000*

#### 18.

#### The face value of 9 in 49,001 is __________

*Ans: 9*

#### 19.

#### The smallest six digit number is _____

*Ans: 1,00,000*

#### 20.

#### The greatest six dight number is _____

*Ans: 9,99,999*

#### 21.

#### one lakh is equal to __________ in international system

*Ans:1 hundred thousand*

ie

place value of one in international system is rpresented in indian sytem as ( hundreds, tens, ones)

place value of thousand in international system is rpresented in indian sytem as ( Lakh, ten thousand, thousand)

place value of Millions in international system is rpresented in indian sytem as ( Ten crores, Crore, Tenlakhs)

in international system there are three period , one period, thousand period and million period

ie. three place value period in international system eg 92,354,689

the above number in indian place value period: 9,23,54,689

#### 22.

#### 10 lakh is equal to _____ million

*Ans: 1miilion*

#### 23.

#### 10 million is equaal to _____ crore

*Ans: 1 crore*

#### 24.

#### 10 crore is equal to _____ million

*Ans: 100 million*

#### to be updated in each week.......