Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Which is faster, Heat or Cold ? Explain.

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

Can you name four days which start with the letter 'T'?

Can you solve the photo plexer logic ?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?