Which number should replace the question mark?

Which Burger Is Different in below image?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Why is it very easy to weigh a fish?

Spot the 3 Differences in the given Picture.

It's been the first day of the school when a young girl was found raped and murdered.
Police suspect four male teachers as on the killers and ask them what they were doing in the morning in time 8:00 am.
1. Wayne: I was reading the newspaper.
2. Terry: I was checking chemistry papers
3. Bridge: I had locked myself in my room as my wife left me.
4. Cole: I dropped my wife to her office.

Who is the killer?

Can you name some countries which do not have the alphabet 'A' in them?