No one wants to have it, but if one got it, he does not want to lose it. What is It?

Take one out and scratch my head, I am now black but once was red. What am I?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

What goes up but never comes down?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Which tank will fill first?

Move four matchsticks to the below square to form three squares?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?