Why Wine Glass Stem is so long?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

People put me on the table and cut me but do not eat me. What am I?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

You see me once in June, twice in November, and not at all in May. What am I?

What has lots of eyes, but can’t see?

All of you like to eat me. I am a five-lettered word. Remove the first two and I turn into an infamous animal. Remove just the first and I become a heinous crime. Remove the first and the last and you can groove on me.

Can you guess who am I?