Why is the Hole below a Lock?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

How many triangles are there in the picture below?

What does this rebus riddle means ?

I have feet, but no legs. Which animal Am I?

Find the next number in the following series:
6, 14, 26, 98, __?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

What is the difference between a jeweller and a jailer?