If the nth term of an A.P. is 4n + 1, then the common difference is
3
4
5
6
Correct Answer : B
Look at this series: 15, __, 27, 27, 39, 39,...What number should fill the blank?
Which pair of numbers comes next 13 29 15 26 17 23 19
Which pair of numbers comes next 7 9 66 12 14 66 17