I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

I throw two dice simultaneously.

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

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Can you identify the hidden rebus in the image below?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?