Why are all black people so quick ?

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 am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

You have two bottles of pills marked with labels A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Can you find out which options fits best with the missing column?

Which word does the below Plexor means ?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?