When it's bad luck to meet a black cat?

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?

Imagine you are in a room with no windows or doors. How will you get out?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

Can you make four (4) nines (9) equal 100?

Can you count the number of quadrilaterals in the picture below?

On 26-01-2022, Juli was murdered at her house in a city in India in the afternoon. There were three suspects in the murder and the following are the statements that were given by them:

John: I visited my village that day.
Jacob: I was out to deposit my house tax in the municipality office at that time.
Jonny: I was at a friend's place having lunch at that time.

Can you find out who is the murderer?

I have Rs.50 and I spend it in the way as below.

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?