SOLUTION: what number is missing from this pattern 3,8,18,? 53,78

Algebra ->  Sequences-and-series -> SOLUTION: what number is missing from this pattern 3,8,18,? 53,78      Log On


   

Question 671129: what number is missing from this pattern 3,8,18,? 53,78
Answer by lion2(2) About Me  (Show Source):
You can put this solution on YOUR website!
3
8=3+5
18=8+10
x=18+15
53=x+20
78=53+25 ,from these x=33 therefor the missing number ir 33