What month of the year has 28 days?

Why do we preferably have round manhole covers and not square ones?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

There are two beautiful yet remote islands in the South Pacific. The Islanders born on one island always tell the truth, and the Islanders from the other island always lie.
You are on one of the islands and meet three Islanders. You ask the first which island they are from in the most appropriate Polynesian tongue, and he indicates that the other two Islanders are from the same island. You ask the second Islander the same question, and he also indicates that the other two Islanders are from the same island.
Can you guess what the third Islander will answer to the same question?

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?

Which is faster, Heat or Cold ? Explain.

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

Can you find out who is the kidnapper in below Picture and why, Explain ?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?