1. Your best friend told you a secret today and you want to tell 2 more people. On day 2 you tell those 2 people. By the end of the second day you and your 2 friends know the secret.If each person tells 2 friends the secret, how many people would know the secret( excluding your best friend) by the end of day 9?
2.Your house has been invaded by cockraches and you need to know how many cockroaches there are. There are 3 cockroaches on day 1 , and every day 3 more cockroaches than the day before come to your house, find how many cockraches would there be by the end of day 9.
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