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

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

A guy in his thirties is found dead in a forest. The shocking thing about the body is that he is wearing his swimming trunks snorkel and a facemask.

For your information, the nearest lake is some 10 miles away and the sea is hundreds of miles away.

How did he die then?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Can you find out the remainder when 3^300 is divided by 5?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?