Take away the whole and some still remain. What is it?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

what does this below rebus represent identXQQQQQME

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?