User:Brainy20069

The Burt theory that Jacob corrected and Pearson scribed

You can use the formula ⟨(l-a)÷ d⟩+1= N

l=the first term given

a=the last term given

d=the amount if difference between each term

History This formula was created by three 16 yr old's, on 26/11/10 while bored in a maths lesson.