Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

You can hear me, but you can't touch or see me.

What am I?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

What's the only room from which no one can enter or leave

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Count the Triangle in the figure given below:

I have eight fingers and two thumbs but I do not live. What Am I?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

If your uncle’s sister is not your aunt, what relation is she to you?

What has many keys but can’t open a single lock?