Can you find out which number multiplied by itself will give the output as 12345678987654321?

There is something which is always coming but never arrives?

How many bananas can you eat if your stomach is empty?

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?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

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

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Count the number of triangles in the below picture?