John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What word begins and ends with an E, but has only one letter?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

People put me on the table and cut me but do not eat me. What am I?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

People make me, save me, change me, raise me. What am I?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

If six children and two dogs were under an umbrella, how come none of them got wet?