It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What does below chemistry rebus means?

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

If an electric train is travelling south, then which way is the smoke going?

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

Spot what is wrong here in below Picture?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?