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?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

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

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

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

I have an eye but still cannot see.

Who am I?