1. 
How many diagonals does a 63sided convex polygon have?



2. 
If m, s are the average and standard deviation of integers a, b, c, and d, is s > 0?
(1) m > a
(2) a + b + c + d = 0



3. 
The average weight of a group of 30 friends increases by 1 kg when the weight of their football coach was added. If average weight of the group after including the weight of the football coach is 31kgs, what is the weight of their football coach in kgs?



4. 
If the ratio of the sum of the first 6 terms of a G.P. to the sum of the first 3 terms of the G.P. is 9, what is the common ratio of the G.P?



5. 
Set A contains all the even numbers between 2 and 50 inclusive. Set B contains all the even numbers between 102 and 150 inclusive. What is the difference between the sum of elements of set B and that of set A?




