It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Who can jump higher than a Mountain?

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

Who am I?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

What do you see in the image below

How many times can you subtract the number 5 from 25?

I know a nine-letter word having only one vowel.
Do you ?