Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

It is always ahead of me yet I can never see it. What is it?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

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

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

Why is the Hole below a Lock?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Using Only Five 5's and any mathematical operator make sum as 37

By what process could you make a 'Tea-Table' into food?