What is the fastest way to double your money?

Only Highly Attentive Can Spot The Ladder In This Library In 7 Seconds! Can You?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Can you find the 09 errors in the picture below?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

When it is alive we sing, when it is dead we clap our hands. What is it?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

What do you think with the below Picture ?