Replace the question mark with the correct number in the below-given picture?

What part of the chicken has the most feathers?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

Given the numbers between 1 and 1 million, what is so special about the number 40 that it makes the number stand out of the crowd?

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

You need to cut a round cake into eight equal pieces with just 3 cuts. Can you do it?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

Find The Missing Number, 99% of People Fail To Solve This Table, Can You?

In a town, there are four houses located at different distances from each other. Following are the distances:

The third house is 60 meters apart from the first house.
The fourth house is 40 meters apart from the second house.
The third house is 10 meters nearer to the fourth house than it is to the second house.

Can you find out the distance between the fourth and the first house?