Question 1
What is the next number in the sequence?
Explanation: In order to find the next number in the sequence, take a look at the patterns and common differences between the existing numbers in the sequence. Starting with 
, we add 
to get 
and then subtract 
to get 
.
By the time we get to 
, we have subtracted 
from 
to complete the cycle of common differences. We will therefore add 
to 
next, getting the missing number 
.
, we add to get and then subtract to get .
By the time we get to , we have subtracted from to complete the cycle of common differences. We will therefore add to next, getting the missing number .