What if the jelly bean machine gives 3 jelly beans to the first customer who put in a coin, 4 to the second, 8 to the third, 15 to the fourth, 25 to the fifth, etc.    How many jelly beans will the machine give out if the machine will receive its 35th coin?

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What if the jelly bean machine gives 3 jelly beans to the first customer who put in a coin, 4 to the second, 8 to the third, 15 to the fourth, 25 to the fifth, etc. 
 
How many jelly beans will the machine give out if the machine will receive its 35th coin?

and how about its 12th coin? 

How many has the machine given out after 12 coins are put into the machine? 

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