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

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

What seven-letter word has hundreds of letters in it?

Which Travels Faster? Solve below famous picture riddle:

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

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

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?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

I am the fastest animal but cannot climb the tree. What am I?

When it is alive we sing, when it is dead we clap our hands. What is it?