Can you replace the question mark with the correct number in the below table sequence?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

What does this below rebus puzzle mean?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Solve the puzzle by telling what does below picture means.

Buy me, smell me or deliver me, I do not change.

Who am I?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Solve The below Equation:

ALFA + BETA + GAMA = DELTA