Find the next number

Find the next number is a all mathematical game in that you must use logic skills to figure out the rules of the sequence.You will be provided mornally from 4 to 6 first numbers, your task is to find the next number that appears next in the sequence. It will be more easier for you will have four answers to choose from. If you choose wrong anser three times you will have to play again.Level starts from 0 and the difficulty of the game increases after each level.Wish you have fun.