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?

My location can be determined by the below rebus.
So where am i ?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

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?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Why is the Hole below a Lock?

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

Find the next number in the series.
1 10 24 43 67 ?