What word does this rebus represent?

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meta meta

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Where do you go to learn how to make ice cream?

What does this below rebus puzzle mean?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

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

Who is that with a neck and no head, two arms and no hands? What is it?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?