I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

What Adam and Eve do not have but the rest of the people have?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

Which Travels Faster? Solve below famous picture riddle:

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Identify The phrase in the picture.

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.

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?