If it took eight men ten hours to build a wall, how long would it take four men to build it?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

I have no life, but I can die. What am I?

You need to remove two matchsticks to make the below equation true. Can you do it ?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

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 ?