I would choose topic number 10 - Africa and its problems.
1/3 ,4/12.5/15,7/21,10/30,8/24,12/26 .Just to name a few
A brief explanation of this would be you are taking 1/3 of all numbers so there 5 right ,5 times 3 is 15 and you go on and on!!!!An 15 becomes you denomenator and 5 is your numerator.
The word 'that' is the demonstrative adjective.
Don't forget the most common demonstrative adjective used are This, That, These, Those.
A rhetorical device uses words in a certain way to convey meaning or to persuade. It can also be a technique to evoke an emotion on the part of the reader or audience.