Mode

Mode is where you find the most common number from the varitey of nummbers you are given. 

Prime numbers are numbers which can only be divided by itself and 1. All primes end in 1,3,7,or 9 apart from 3 and 5

Range is where you find out the smallest number and take it away from the biggest number.

Acute angels are 0 degrees to 89 degrees.

Right angels are 90 degrees.

Obtuse angles are 91 degrees to 179 degrees.

Straight angles is 180 degrees.

Reflex angles are  181 degrees to 360 degrees. 

To find out mean you have to add all the numbers up then divide it from how many numbers you added up.