Question

fill the gap in the following with the proper number 3,14,54,159,_

Answer 1

9=9
9x1+1 =10
10x2-2=18
18x3+3=57
57x4-4=224
224x5+5=1125

9,10,18,57,224,X
X=1125     9,10,18,57,224,1125

Answer 2

3,14,54,159,_  answer is 580
3×4+2=14
14×4-2=54
54×3-3=159
159×3+3=580