Which Burger Is Different in below image?

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

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

There is a place where if I stand up straight, I will still be considered sideways.

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

what one word does the below rebus identifies?

What does this rebus means ?

PROG WORKRESS

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?