What month of the year has 28 days?

Count the number of triangles in the below picture?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

Replace the question mark with the correct number.

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

I add 5 to 9 and get 2. The answer is correct, so what am I?

If an electric train is travelling south, then which way is the smoke going?

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