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

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

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

Can you find a five letter word that is left with only two letters if one is removed?

Can you fill the blank with the correct number?

6 30 870 756030 _____

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

Can you decipher the two rows to find the hidden word?

How can you take 2 from 5 and leave 4?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?