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.

Buy me, smell me or deliver me, I do not change.

Who am I?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

What country can make you shiver?

How many words can a pen with half refill write?

Count the number of triangles in the picture below:

What question can you never answer yes to?

What word does this rebus represent?

meta meta
meta meta

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?