Keyboard words are not in alphabetical order, Why?

What is black when you buy it, red when you use it, and gray when you throw it away?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

What is the end of everything?

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

Rihana, Peeta, and Logan order a pizza for $10. Out of the three, Rihana and Peeta were quite hungry and ate 6 slices a piece, while Logan had just 2 slices.

Now, they want to split the cost among them fairly but due to the lack of change, they decide to round off the cost to the nearest possible dollar.

Can you find out the fairway which should be used to split the money?

What if the pizza was worth $11?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?