Why did the Girl throw the butter out of the window?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

I cannot talk, but I always reply when spoken to. What am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

During which month do people sleep the least?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

I taste better than I can smell. Who am I?