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

What Word am I Looking For ?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

What demands an answer, but asks no questions

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

A container contains 100 eggs. They can be either fresh or rotten. What is sure is the fact that there is at least one fresh egg in that container.

If you are asked to pick two eggs randomly from the container, at least one of them will be rotten.

Can you calculate how many eggs in that container are fresh?