# Least Common Multiples Workbook

Least Common Multiples Workbook

All the composite numbers can be broken into their factors which are prime.

Methods of finding factors of a number

1.    Prime factorisation method or Branching method :

2.    Division method of prime factorisation :

Problems

1.    The smallest prime number is :

2.    How many prime nos are there from 1 to 100 ?

3.    Which is the smallest composite number ?

4.    Give an example of even prime number.

5.    How many even prime numbers are there?

6.    How many one digit prime numbers are there ?

7.    What is the addition of first four prime numbers ?

8.    Which is the smallest two digit composite number ?

9.    Which is the smallest two digit prime number ?

10.  Which is the biggest two digit prime number ?

11.  Write 5 examples of coprime numbers.

12.  Write 5 examples of twin prime numbers.

13.  Write all the prime numbers between :

a. 14 and 35

b. 80 and 100

c. 51 and 72

d. 40 and 55

14.  Write all the composite number between :

a. 20 and 45

b. 65 and 83

c. 85 and 100

d. 47 and 64