Are these sentences written correctly?
When I jumped into the pool the water flew to different quarters.

I don't remember on what day i saw him last.

What's size of your shirt?

There is no salt in my soup I believe the cook forgot to sprinkle it with salt.

Question

Are these sentences written correctly?
When I jumped into the pool the water flew to different quarters.

I don't remember on what day i saw him last.

What's size of your shirt?

There is no salt in my soup I believe the cook forgot to sprinkle it with salt.

Answer

When I jumped into the pool the water splashed in different directions.

I don't remember on what day I last saw him.

What size is your shirt?

There is no salt in my soup. I believe the cook forgot to add any.

Answer

When I jumped into the pool,  the water splashed in different directions.

I don't remember the day I last saw him .

What's the size of your shirt?

The soup is not salty enough, I believe the cook has forgotten to add salt to it .