Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

O_er_t_o_

Complete the missing letters of the given word.

Can you solve this picture maths equation?

Give it food and it will live; give it water and it will die.

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

People put me on the table and cut me but do not eat me. What am I?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?