Study the pattern and complete the series: 5, 11, 17, 25, 33, 43, ?
first two number has has difference of 6 and
then two number has difference 8
and after that two number is having difference 10
5+6=11
11+6=17
17+8=25
25+8=33
33+10=43
43+10=53
so answer will be 53