Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

What does below chemistry rebus means?

What type of tree can I carry in my hand?

Decode below rebus
D
N
A
T
S , D

Which Travels Faster? Solve below famous picture riddle:

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

What number divided by 4 is the same as that number minus 4?

Remove two matchsticks to make the below equation correct.