When I break for example 9 doors in survival, complete some mission, and take as new quest break exactly 9 doors, which I brake just now, it makes me crazy!
It really waste my happiness of new record:-(
Mathematics of game: 125=126.
Proof: All upgrades that need 125 pieces of something can be pay only in sets of three pieces. 125 can't by divided by 3, but last payment take all three pices. So you need 126 pieces to full 125 pieces.
If you like switchmania test this level:
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