Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

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

What English word has three consecutive double letters?

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.

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Can you count the number of triangles in the given figure?

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

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?