Grandmas and Trolls?!


Question: You are on your way to visit your Grandma, who lives at the end of the valley. It's her birthday, and you want to give her the cakes you've made.

Between your house and her house, you have to cross 7 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake.

How many cakes do you have to leave home with to make sure that you arrive at Grandma's with exactly 2 cakes?


Answers: You are on your way to visit your Grandma, who lives at the end of the valley. It's her birthday, and you want to give her the cakes you've made.

Between your house and her house, you have to cross 7 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake.

How many cakes do you have to leave home with to make sure that you arrive at Grandma's with exactly 2 cakes?

I would say 2: At each bridge you are required to give half of your cakes, and you receive one back. Which leaves you with 2 cakes after every bridge.
am I right?

9 cakes?

a star for you,but i'm afraid i'm going to just wait for the answer.sorry.

those are just about the kindest trolls i have ever heard of,,,,U started with 2 cakes & end with 2 cakes,,,,got me think for a while.....The question is,,,,,,, is that how r u going to go back if u have no cakes left? cause the trolls r going to ask for some kind of payment,,,,,,my suggestion is bring your grandma & grandpa along when u go back,,,give em yr grandpa & they give him back to u,,,

130 Cakes









lol

to end with 2 you'd have to give the last troll 1 - so you shoud've had 2.. half of which is one but you get back the one from them anways -
and this would be the case at every bridge!
so i'd have started with 2



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