what does the below math rebus puzzle mean?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

Can you count the number of triangles in the given figure?

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

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

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?

How many letters are in the alphabet?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.