What can you deduce from the following BrainBat?

CRY
LMKI

How can one talk without saying a single word?

Can you find the key in the picture below?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Which letter of the alphabet has the most water?

A sundial has the fewest moving parts of any timepiece. Which has the most?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?