How many times does the number 3 occur in unit's place for numbers ranging from 1 to 100?

On selling rice for Rs. 45 per kg, a shopkeeper bears loss of 20%. To earn a profit of 20%, the selling price should be

Which country among the following is the smallest in terms of area?

An assertion and a reason are given below.
Assertion: The phenomenon of nuclear fission generates great energy.
Reason: The process in which a nucleus is broken into two parts is called nuclear fission.
Choose the answer.

Identify the odd one from the list below.