Numeral: In Hindu Arabic system, we use ten symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 called digits to represent any number.
A group of digits, denoting a number is called a numeral.
We represent a number, say 689745132 as shown below:
Ten Crores 
Crores

Ten Lacs(Millions)

Lacs

Ten Thousand

Thousands

Hundreds

Tens

Units 
6  8  9  7  4  5  1  3  2 
We read it as: 'sixtyeight crores, ninetyseven lacs, fortyfive thousand, one hundred and thirtytwo".
Place Value or Local Value of a Digit in a Numeral: PLACE VALUE or LOCAL VALUE of a digit in a numeral is the value of the digit, depending on its place. We can relate place with 'place value'
For Example: Let Number is 689745132
Place value of 2 is \((2 \times 1)\) = 2
Place value of 1 is \((1 \times 100)\) = 100
Place value of 6 is \(6 \times 10^{8}\) = 600000000.
Face Value: FACE VALUE of the digit in numeral is the value of digit itself, irrespective of its place in numeral.
For Example: Let Number is 689745132
The Face value of 2 is 2.
The Face value of 3 is 3
Different Type of Numbers:
1. Natural Numbers
2. Whole Numbers
3. Integers
4. Even Numbers
5. Odd Numbers
6. Prime Numbers
7. Composite Numbers
Natural Numbers: Counting numbers 1, 2, 3, 4, 5, are called Natural Numbers.
Whole Numbers: All counting numbers together with zero forms the set of whole numbers. Thus,
Integers: All natural numbers, 0 and negatives of counting numbers i.e., { ...... 3, 2, 1, 0, 1, 2, 3, ...........} together form the set of integers.
Positive Integers: {1, 2, 3, 4, 5, .... } is the set of all positive integers.
Negative Integers: {1, 2, 3, 4, ......} is the set of all negative integers.
NonPositive and NonNegative Integers: 0 is neither positive nor negative. So, {0, 1, 2, 3, 4, ...} represents the set of nonnegative integers, while {0, 1, 2, 3, 4, .....} represents the set of nonpositive integers.
Even Numbers: A number divisible by 2 is called an even number. eg, 2, 4, 6, 8, 10 etc.,
Odd Numbers: A number not divisible by 2 is called an odd number. eg, 1, 3, 5, 7, 9, 11, etc.,
Prime Numbers: A number greater than 1 is called a prime number if it has exactly two factors, namely 1 and the number itself.
Prime numbers up to 100 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.