PPT: Factors and Multiples | Mathematics for Class 5 PDF Download

 Page 1


FACTORS AND
MULTIPLES
MATHS
Page 2


FACTORS AND
MULTIPLES
MATHS
Prime Numbers: Building
Blocks
Prime numbers are divisible only by 1 and
themselves.
Example- 2, 3, 5, 7, 11, 13, ...
NOTE - 1 is not prime, 2 is the
only even prime.
Page 3


FACTORS AND
MULTIPLES
MATHS
Prime Numbers: Building
Blocks
Prime numbers are divisible only by 1 and
themselves.
Example- 2, 3, 5, 7, 11, 13, ...
NOTE - 1 is not prime, 2 is the
only even prime.
COMPOSITE NUMBERS
Composite
numbers have
factors other than
1 and themselves.
EXAMPLES
4, 6, 8, 9, 10,
12, 14, 15, ...
Page 4


FACTORS AND
MULTIPLES
MATHS
Prime Numbers: Building
Blocks
Prime numbers are divisible only by 1 and
themselves.
Example- 2, 3, 5, 7, 11, 13, ...
NOTE - 1 is not prime, 2 is the
only even prime.
COMPOSITE NUMBERS
Composite
numbers have
factors other than
1 and themselves.
EXAMPLES
4, 6, 8, 9, 10,
12, 14, 15, ...
Twin Primes Prime Triplet
Prime numbers
differing by 2, e.g., (3,
5), (5, 7).
Three prime
numbers differing by
2, e.g., (3, 5, 7).
Co-prime Numbers
Numbers with no
common factor
other than 1, e.g.,
(2, 3), (3, 4).
Page 5


FACTORS AND
MULTIPLES
MATHS
Prime Numbers: Building
Blocks
Prime numbers are divisible only by 1 and
themselves.
Example- 2, 3, 5, 7, 11, 13, ...
NOTE - 1 is not prime, 2 is the
only even prime.
COMPOSITE NUMBERS
Composite
numbers have
factors other than
1 and themselves.
EXAMPLES
4, 6, 8, 9, 10,
12, 14, 15, ...
Twin Primes Prime Triplet
Prime numbers
differing by 2, e.g., (3,
5), (5, 7).
Three prime
numbers differing by
2, e.g., (3, 5, 7).
Co-prime Numbers
Numbers with no
common factor
other than 1, e.g.,
(2, 3), (3, 4).
Sieve of
Eratosthenes
A Greek mathematician,
Eratosthenes, devised a method
to find out prime numbers
between 1 and 100.
Step 1: Write all the numbers
from 1 to 100 in a table.
Step 2: Cross out 1 as it is not a
prime number.
Step 3: Circle 2 and cross out
multiples of 2.