In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

How can you tell a raw egg from a hard-boiled egg?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?