* The angle between a tangent and radius is always 90o
* The angle at the centre is always double the angle at the circumference
* The angle formed by a semi circle is always 900.
Question 1
There are 12 boys and 15 girls in a class. One boy and one girl will be selected to represent the class on the student council. Work out the total number
Working out the LCM of two numbers
* find the prime factors of both numbers
* add all the numbers to a Venn diagram
* multiply every number
* check it is correct by dividing by each
