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Mensa Prize Puzzle Competition - March 2020

Question: 

What number should come next in this sequence?

4    9    20    43    90    185    376    ?

Answer: 

759. Multiply by two and add one, multiply by two and add two, multiply by two and add three etc.

 

Closing Date: 
Tuesday, March 31, 2020
Show Answer On: 
Wednesday, April 1, 2020