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

If an electric train is travelling south, then which way is the smoke going?

What is the next number in the series?

15 29 56 108 208 ?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

What brings you down but never up?

When can we add 2 to 11 and get 1 as the correct answer?

what one word does the below rebus identifies?