Good Riddles

 
Head Candy (medium)

Question: I have existed for centuries, but last only a month. What am I?

Question: in all of written history I won't show up at the end of a sentence but I will be there in the end . . .

Time for Men (medium)

Question: Time belongs to men twice a day - what time is it?

The Tide (medium)

By Fred

Question: At low tide 14 rungs of a ship are above the water, the rungs are 15 centimeters apart. each 15 mins the water rises 15 centimeters. after 2 hours and 30 mins how many rungs are above the water?