Which word does the below Plexor means ?

Replace the question mark with the correct number.

Keyboard words are not in alphabetical order, Why?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

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?

What is the last thing you take off before bed?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?