Question 1: Divide 10500g in the ratio 3:11

Question 2:
Divide 2100ml in the ratio 5:2

Question 3:
find the nth term: 2,7,12,17,...

Question 4:
if the nth term of a sequence is 7n+6 what is the 9th term?

Question 5:
the mean of 16,x,3,14,57 is 22. find x.

Question 6:
the mean of 4,x,5,6,1 is 5. find x.