Please do sped some additional time on this question if you have got it already its great but if you haven't it is still great Yeah It is great because I hop you will realise the importance of discipline in problem solving The above sequence is of prime numbers between 13 and 43
13, 17, 19, 23, 29, 31, 37, 41, 43
Question have no limit variety and one should not attempt to cover all the varieties of problems exhaustively Rather it is much more important to set you brain to think in certain manner to be able to solve problems.