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

Be active and find the killer in the picture Riddle below.

How many triangles can you count in the figure given?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

Decode this picture on T-Shirt and tell what it says ?

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

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.