Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

What does below chemistry rebus means?

What can you see in the middle of March and April that you can never see in any other month?

Our product and our sum always give the same answer. Who are we?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

How is the moon similar to a dollar?

Using Only Five 5's and any mathematical operator make sum as 37

Be active and find the killer in the picture Riddle below.

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.