Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

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

I am an odd number. Take away a letter and I become even. What number am I?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

What four weights can be used to balance from 1 to 30 pounds?

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What does below chemistry rebus means?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?