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

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

What is the end of everything?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

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

How could a baby fall out of a twenty-story building onto the ground and live?

Can you count the number of triangles in the given figure?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Bay of Bengal is in which state?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?