Good Riddles

Question: There is a boat which can only support 80 kilos weight transport. A man has 2 sons. Man weighs 80 kilos and both sons are 40 and 40 kilos. They want to go to the Island with this boat, but going there together adds up to 160 kilos? What should they do to get them all on the Island?

Question: There has just been a heavy snowfall, Jeff goes out side and finds that there is twice as much snow in his garden as his neighbour's Kate but Jeff doesn't seem surprised.Why?

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?

Question: Peter is hiding but his head is can seen.

Question: What key is playful?