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Mensa Prize Puzzle Competition - January 2017

Question: 

What number should replace the question mark in the grid?

Answer: 

Six. On each row the last two digits are multiplied to give the first two

Closing Date: 
Wednesday, August 2, 2017
Show Answer On: 
Monday, August 7, 2017
Winner: 
Congratulations to L MacDonald from London and R Vinnicombe from Birmingham