I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

What is the Surname of Barbie Doll?

If two's company, and three's a crowd, then whats four and five ?

What is the centre of gravity?

Bay of Bengal is in which state?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

O_er_t_o_

Complete the missing letters of the given word.

A river should be crossed by a father, a mother and their two sons and two daughters.
There are some rules that should be followed while crossing the river. There can be only two people in the raft while crossing. The daughters cannot be with their father unless there is the presence of the mother. The sons cannot be with their mothers unless the father is present. Unless the guard is on the board, the criminals cannot be with any of the family members. Only the adults like the father, the guard, and the mother knows to use the raft.

How will they cross the river?

I’m tall when I’m young, and I’m short when I’m old. What am I?