2. Prime and Composite numbers
Prime numbers: The numbers which are divisible by its own
Like 2,3,5,7,11,13,17,19…………………………………….
Composite numbers: The numbers which are divisible by others numbers as well.
4,6,8,9,10,12,14,15,16……………………………………….so on
3. 01: What are the prime numbers between 20 and 30?
a. 23, 27
b. 22, 25,29
c. 22,23,27
d. 23,29
4. 02: Which of the following is even prime number?
a. 3
b. 2
c. 7
d. 12
5. 03: What is the sum of composite numbers between 1 to 10:
a. 27
b. 15
c. 19
d. 14
9. 01: Which one of the following has 0 in the tens place?
a. 1205
b. 5064
c. 580
d. 950
10. 02: What is the place value of 8 in the numbers 3,580?
a. Ones
b. Tens
c. Hundreths
d. thousands
11. 03: What does the eight represent in 5834?
A. 8
B. 80
C. 800
D. 8000
12. Order Relationship
An order relation is a relation that ranks elements against one another
1. x is larger than y”
2. x is a subset of y
3. x divides y
4. x is a part of y
13. Properties of Order Relations
1. x ≤ y
2. 1 ≤ 5 and 5 ≤ 8
3. 1 ≤ 5 and 5 ≤ 8 1 ≤ 8
Similarly
Greater than and =
14. Relations
A relation in mathematics defines the relationship between two different sets of
information. If two sets are considered, the relation between them will be
established if there is a connection between the elements of two or more non-
empty sets
This mapping depicts a relation from set A into set B. A relation from A to B is a subset of A x B. The
ordered pairs are (1,c),(2,n),(5,a),(7,n). For defining a relation, we use the notation where,
set {1, 2, 5, 7} represents the domain.
set {a, c, n} represents the range.
15. Multiple forms of numbers
Different ways to write a number.
Standards form
336
In words
Three hundreds and thirty six
Expand forms
300 Hundreds 30 tens 6 ones