What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

This was asked in an interview with Coa-Cola.

The interviewer has given me 100 marbles(50 white and 50 black) and two empty boxes.
He then told me that he will leave the room and i need to place all the marbles in two boxes.

And When he come back, he will draw a marble from any of the two box and if the marble is white I will be hired.

Also
* No box can be empty.
* All 100 marbles must be placed in one of the two boxes.

So what should I have done?

There are forty elephants and they have forty-fore heads. How can this be possible?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?