#81 - Crime puzzle
There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?
Suicide
#82 - Science Puzzle
How can you throw a ball as hard as you can and have it come back to you even if it doesnt hit anything there is nothing attached to it and no one else catches or throws it?
Throw the ball straight up in the air.
#83 - Extraordinary Riddle
Something Extraordinary happened on May 6th 1978 at 12:34am what was that?
At that moment, the time, and day could be written as '12:34 5/6/78'
#84 - Friday The 13th Riddle
Many people would think Friday the 13th will be an unlucky day. Is it possible that there is no Friday on 13th through the whole year? How many Fridays at 13th can we have in a year at most? Can you calculate it out?
We can calculate out how many days there will be for the 13th on each month if we count from the beginning of the year (January 1). Then we divide total days by 7 to get the remainders. We also need to consider the leap year. Through the whole year we had all kinds of remainders, from 0 to 6. The minimum of occurence for all the unique remainders was 1. It means that we have at least one Friday on 13th. In a regular year, the best chance you can get 3 Fridays on 13th, which are in February, March and December because the remainders of these 3 months are 2. In a leap year, the best chance you also can get 3 Fridays on 13th, which are in January, April and July because the remainders of these 3 months are 6.