How do you go from 98 to 720 using just one letter?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

what does this picture(rebus) riddle means ?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

What does this rebus means ?

PROG WORKRESS

100 prisoners are stuck in the prison in solitary cells. The warden of the prison got bored one day and offered them a challenge. He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once". If that happens to be true, all the prisoners will be set free. If it is false, then all the prisoners will be executed. The prisoners are given some time to discuss and figure out a solution. How do they ensure they all go free?