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

What does this Rebus Picture mean?

What has many keys but can’t open a single lock?

What Adam and Eve do not have but the rest of the people have?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

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

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?