Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

Can you solve the below tricky visual equation?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What breaks yet never falls, and what falls yet never breaks?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

Can you identify the famous TV character from the rebus below?

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?