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

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

Count the number of triangles in the given picture.

Find the number of squares in the below-given picture.

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

What is the last thing you take off before bed?

What is the difference between a jeweller and a jailer?

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS