Spot what is wrong here in below Picture?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Can you find the hidden animal in the picture below?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Prove that twice of ten is the same as twice of eleven.

What is the fastest way to double your money?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

What Time Should the last watch show in the below figure?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?